Corrosion background
Design basis
Port equipment
Concrete structure
Port storage tanks
Steel pipe pile
Port machinery is the core equipment in the operation process of ports, and the long-term and stable operation of port machinery is the basic guarantee for the normal operation of ports. The main operating environment for port machinery is the open-air environment of the dock, where the air humidity is very high and can also cause corrosion to the port machinery. Therefore, in the production process of port machinery, it is necessary to fully consider the anti-corrosion issue of port machinery, in order to improve the production technology and maintenance level of port machinery, and ultimately enhance the competitiveness of the port.
Port machinery is susceptible to corrosion from seawater during actual operation, and considering the harsh outer surface environment of port machinery, high air humidity can also cause a certain degree of corrosion to the mechanical surface
Therefore, in the production process of port machinery, timely anti-corrosion treatment that fully complies with technical standards is carried out on the surface of port machinery. After the operation of port machinery, there will still be varying degrees of corrosion, which may even lead to different degrees of corrosion after the operation of port machinery, and even cause cracks and peeling on the surface of port machinery, resulting in the loss of the original anti-corrosion function of port machinery anti-corrosion coating.
Current national standards and regulations, mandatory standard provisions, etc;
Code for Construction and Acceptance of Building Anti corrosion Engineering (GB50212-2002)
GB8923-1988 "Standard for Corrosion and Derusting Grades of Steel Surfaces before Coating"
Safety Regulations and Safety Management Rules for Painting Operations (GB6514-1995)
Quality Requirements for Anti corrosion Coatings (GB6514-1991)
Safety Regulations for Paint Operations, Paint Process Safety, and Ventilation Purification (DJ/T6931-1999)
Code for Construction and Acceptance of Industrial Equipment and Pipeline Anti corrosion Engineering (HGJ229-91)
Safety Regulations for Painting Operations - Safety of Pre treatment Processes for Painting (GB7692-87)
Noise Limits for Construction Sites (GB12523-90)
ISO9001 Quality Management System Documents
ISO14001 Environmental Management System Document
GB/T28001 Occupational Health and Safety Management System Documents
Environmental conditions: The corrosion level of atmospheric environment on building steel structures under long-term action can be determined according to Table 1.
| Classification of Atmospheric Corrosivity and Typical Environmental Cases | ||||||
|---|---|---|---|---|---|---|
| Corrosivity level | Loss of mass and thickness per unit area（After the first year of exposure） | Typical environmental cases under warm climate conditions（For reference only） | ||||
| Bottom carbon steel | zinc | outer surface | interior surface | |||
| Mass loss | Thickness loss | Mass loss | Thickness loss | |||
| /g·m2 | /um | /g·m2 | /um | |||
| C1 Low content | ≤10 | ≤1.3 | ≤0.7 | ≤0.1 | / | Heated interior of buildings with clean air, such as offices, shops, schools, and hotels |
| C2 Low content | ＞100-200 | ＞1.3-25 | ＞0.7-5 | ＞0.1-0.7 | Low pollution level atmosphere, mostly in rural areas | Unheated buildings where condensation may occur (such as warehouses, gyms, etc.) |
| ＞200-300 | ＞25-50 | ＞5-15 | ＞0.7-2.1 | Urban and industrial atmospheres, moderate sulfur dioxide pollution, and low salinity coastal areas | In production plants with high temperatures and some air pollution, such as food processing plants, laundry plants, distilleries, dairy factories, etc | |
| C4 High content | ＞400-650 | ＞50-80 | ＞15-30 | ＞2.1-4.2 Chemical plants, swimming pools, coastal ships, shipyards, etcrial and coastal areas with moderate salinity | Chemical plants, swimming pools, coastal ships, shipyards, etc | |
| C5 High | ＞650-1500 | ＞80-200 | ＞30-60 | ＞4.2-8.4 | Industrial areas with high humidity and severe weather, and coastal areas with high salinity | Buildings and areas where condensation and high pollution continue to occur and exist |
| CX Extreme | ＞1500-5500 | ＞200-700 | ＞60-180 | ＞8.4-25 | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and aggressive atmosphere | Industrial areas with extremely high humidity and corrosive atmosphere |
| Note: The loss value used to define the corrosiveness level is the same as that given in ISO9223. | ||||||
Composition: quay crane, yard crane, rail crane, ship loader, spiral unloader, bucket wheel machine, gantry crane, gantry crane, floating crane, fixed crane, belt conveyor, etc;
Environment: These port machinery and equipment are installed and operated in ports with harsh atmospheric corrosion environments, with some parts even located in splash zones;
Knka anti-corrosion experts believe that the special engineering of port machinery equipment, metal fatigue caused by overloading operations, and collisions of heavy goods damage the anti-corrosion materials on the surface of metal structures, thereby accelerating the formation and diffusion of corrosion on metal structures. Therefore, it is of great significance to do a good job in anti-corrosion coating to ensure the long-term safety and effectiveness of port machinery equipment.
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, and other personnel engaged in anti-corrosion coating work, providing a certain reference basis for these personnel units. | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Part | Outdoor environment | |||
| Service life | 7-15 years | |||
| Surface Treatment |
Thoroughly spray rust removal to Sa2.5 level (ISO)
8501-1:2007), when observed without magnification, the surface should be free of visible
oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign
impurities. Any residual traces of pollutants should only appear as slight color spots
in the form of dots or stripes. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Cold spray zinc KnkaZinc 96 | 10：0 | 80μm |
| Step 2 | KnkaCover | Cold spray zinc sealing paint KnkaCover 167 | 10：0 | 20μm |
| Step 3 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 10：0 | 120μm |
| Step 4 | KnkaDur | Hardtop AS KnkaDur 550 | 10：0 | 80μm |
| Total Thickness | 300μm | |||
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, and other personnel engaged in anti-corrosion coating work, providing a certain reference basis for these personnel units. | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Part | Outdoor environment | |||
| Service life | 7-15 years | |||
| Surface Treatment | Thoroughly remove rust from manual and power tools to St2 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no loosely attached oxide scale, rust, coating, or foreign impurities. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Cold spray zinc KnkaZinc 96 | 10：0 | 80μm |
| Step 2 | KnkaCover | Cold spray zinc sealing paint KnkaCover 167 | 10：0 | 20μm |
| Step 3 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 10：0 | 120μm |
| Step 4 | KnkaDur | Hardtop AS KnkaDur 550 | 15：3 | 50μm |
| Total Thickness | 270μm | |||
The marine environment has a significant impact on the atmospheric corrosion of steel structures in port machinery and equipment, including chemical and biological factors, whose effects are often interrelated; Knka Technology will focus on introducing the differences between the two, hoping to provide assistance for customers' future anti-corrosion coating work.
Effective Service for Protective Coating of Steel Structures for Newly Built Large Port Machinery and Equipment Life is generally required internationally to last at least 15 years, but the prerequisite is that the construction quality of anti-corrosion coatings for port machinery must meet the standard. Necessary maintenance and upkeep of protective coatings must be carried out throughout the entire process of construction and use. Therefore, modern port machinery and equipment painting particularly emphasizes the surface coating before painting Treat, select high-quality anti-corrosion coatings for port machinery, design coating anti-corrosion matching correctly, strictly manage on-site construction and maintenance during operation to ensure the service of coating Life, China has made clear regulations on the pre-treatment of steel structure coating for port machinery, types of anti-corrosion coatings for port machinery, and anti-corrosion matching.
The maintenance, painting, and anti-corrosion schemes for port equipment such as shore cranes, yard cranes, rail cranes, ship loaders, spiral unloaders, bucket wheel machines, gantry cranes, gantry cranes, floating cranes, fixed cranes, and belt conveyors are as follows:
| Reference basis | The dock equipment and auxiliary equipment, as well as the steel structure of the pipe gallery, are exposed to normal temperature atmosphere C5, and the main corrosion is caused by the humid atmospheric environment in which they are located. | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Adaptation Part | All port machinery equipment that is often exposed to the atmosphere | |||
| Service life | Within 7 years | |||
| Surface Treatment | Thoroughly remove rust from manual and power tools to St2 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no loosely attached oxide scale, rust, coating, or foreign impurities. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaCover | Graphene low surface treatment primer KnkaCover 220 Gns | 20：5 | 200μm |
| Step 2 | KnkaDur | Hardtop AS KnkaDur 550 | 20：5 | 60μm |
| Total thickness of paint film | 260μm | |||
| Reference basis | The dock equipment and auxiliary equipment, as well as the steel structure of the pipe gallery, are exposed to normal temperature atmosphere C5, and the main corrosion is caused by the humid atmospheric environment in which they are located. | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Adaptation Part | All port machinery equipment that is often exposed to the atmosphere | |||
| Service life | Within 7 years | |||
| Surface Treatment | Thoroughly remove rust from manual and power tools to St2 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no loosely attached oxide scale, rust, coating, or foreign impurities. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Graphene zinc foundation make-up KnkaZinc 60 Gns | 15：3 | 80μm |
| Step 2 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 15：3 | 120μm |
| Step 3 | KnkaDur | Hardtop AS KnkaDur 550 | 15：3 | 60μm |
| Total Thickness | 260μm | |||
Concrete structures that require coating protection can be divided into two categories. One type is newly poured concrete, which generally requires curing for more than 28 days under standard conditions (depending on changes in ambient temperature and humidity). Its characteristics are high water content and strong surface alkalinity. The second type is surfaces that have been used for a period of time and have suffered varying degrees of corrosion or weathering. Its characteristics are high surface roughness, porosity, and the presence of weak interfacial layers with low strength, which may also contain pollutants such as oil stains and inorganic salts. The surface of the substrate to be coated must undergo a "Surface" test Treatment "and" cleanliness ". The surface of concrete is a key step in ensuring proper coating application and coating adhesion; The main purpose of "cleaning" is to remove dust, oil stains, moisture, and weak interface layers from the surface, and to increase the interlayer adhesion between the substrate and the coating during coating.
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, and other personnel engaged in anti-corrosion coating work, providing a certain reference basis for these personnel units. | |||
|---|---|---|---|---|
| Corrosion environment | CX Extreme Corrosion | |||
| Part | Concrete wharf, anti wave lifting | |||
| Service life | Within 7 years | |||
| Surface Treatment |
Method 1: High pressure water spraying, usually selecting a pressure of 20-30 MPa to
spray high-pressure water on the surface of concrete, to remove pollutants such as oil
stains, inorganic salts, and weak interfacial layers on the surface. However, similar
pressures cannot achieve good and dense roughness, but using too high a pressure, the
sprayed water flow may damage the concrete, so the specific pressure depends on the
actual working conditions. Method 2: Sweep sand. Dry sand can be used for sweeping the surface of concrete, but more environmentally friendly wet sandblasting is recommended. It is suggested to use steel balls that can be recycled and reused. Sweep sand treatment can remove the floating slurry layer and pollutants on the surface, thereby opening up hidden voids on the surface and making the surface have a considerable roughness and hard substrate surface. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and corrosive atmosphere. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaFloor | Concrete waterproofing and anti-corrosion KnkaFloor 660 | 20：0 | 60μm |
| Step 2 | KnkaCover | Graphene glass flake primer KnkaCover 152 Gns | 20：0 | 240μm |
| Total Thickness | 300μm | |||
Storage tanks are one of the important equipment for port enterprises to store liquid raw materials and intermediate products, and are even more essential for the crude oil pipeline transportation industry. The current volume specifications of crude oil tanks used are There are several types of oil tanks, including 10000 cubic meters, 20000 cubic meters, 50000 cubic meters, and 100000 cubic meters, which can be divided into dome roof oil tanks and floating roof oil tanks according to their structures. During the recent oil tank overhaul process, it was found that the corrosion of the oil tank was quite severe, especially the extensive corrosion of the tank bottom plate, with corrosion pits reaching depths of up to 4-5mm. The distribution rate of corrosion pits is 20-25 per square meter, with localized corrosion perforation. The corrosion of a single floating ship deck is more severe, causing a large area of thinning of the deck by 50% to 60% and local perforation, with the largest hole reaching 300 · 200 mm2。 According to relevant investigation data analysis, single plate corrosion accounts for 60% and bottom plate corrosion accounts for 40% in oil tank corrosion; In tank shutdowns caused by corrosion perforation and oil leakage, bottom plate perforation accounted for 76.4% Single deck perforation of floating vessels accounts for 23.6%. Therefore, strengthening the protection of oil tanks and selecting appropriate anti-corrosion measures can improve the service of oil tanks Reducing the incidence of oil tank accidents is very important.
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, and other personnel engaged in anti-corrosion coating work, providing a certain reference basis for these personnel units. | |||
|---|---|---|---|---|
| Corrosion environment | CX Extreme Corrosion | |||
| Part | Indoor Environment | |||
| Service life | Over 25 years | |||
| Surface Treatment |
Thoroughly spray rust removal to Sa2.5 level (ISO)
8501-1:2007), when observed without magnification, the surface should be free of visible
oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign
impurities. Any residual traces of pollutants should only appear as slight color spots
in the form of dots or stripes. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and corrosive atmosphere. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Cold spray zinc KnkaZinc 96 | 22.5：2.5 | 80μm |
| Step 2 | KnkaCover | Cold spray zinc sealing paint KnkaCover 167 | 18：2 | 40μm |
| Step 3 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 24：2.4 | 140μm |
| Step 4 | KnkaDur | Hardtop AS KnkaDur 550 | 18：2 | 60μm |
| Design total thickness | 320μm | |||
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, and other personnel engaged in anti-corrosion coating work, providing a certain reference basis for these personnel units. | |||
|---|---|---|---|---|
| Corrosion environment | CX Extreme Corrosion | |||
| Part | Indoor Environment | |||
| Service life | Over 25 years | |||
| Surface Treatment |
Thoroughly spray rust removal to Sa2.5 level (ISO)
8501-1:2007), when observed without magnification, the surface should be free of visible
oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign
impurities. Any residual traces of pollutants should only appear as slight color spots
in the form of dots or stripes. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and corrosive atmosphere. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Cold spray zinc KnkaZinc 96 | 15：3 | 80μm |
| Step 2 | KnkaCover | Cold spray zinc sealing paint KnkaCover 167 | 15：3 | 20μm |
| Step 3 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 15：3 | 140μm |
| Step 4 | KnkaDur | Hardtop AS KnkaDur 550 | 15：3 | 80μm |
| Total Thickness | 320μm | |||
Storage tanks are one of the important equipment for port enterprises to store liquid raw materials and intermediate products, and are even more essential for the crude oil pipeline transportation industry. The current volume specifications of crude oil tanks used are There are several types of oil tanks, including 10000 cubic meters, 20000 cubic meters, 50000 cubic meters, and 100000 cubic meters, which can be divided into dome roof oil tanks and floating roof oil tanks according to their structures. During the recent oil tank overhaul process, it was found that the corrosion of the oil tank was quite severe, especially the extensive corrosion of the tank bottom plate, with corrosion pits reaching depths of up to 4-5mm. The distribution rate of corrosion pits is 20-25 per square meter, with localized corrosion perforation. The corrosion of a single floating ship deck is more severe, causing a large area of thinning of the deck by 50% to 60% and local perforation, with the largest hole reaching 300 · 200 mm2。 According to relevant investigation data analysis, in oil tank corrosion, single Corrosion accounts for 60%, while bottom plate corrosion accounts for 40%; In tank shutdowns caused by corrosion perforation and oil leakage, bottom plate perforation accounted for 76.4% Single deck perforation of floating vessels accounts for 23.6%. Therefore, strengthening the protection of oil tanks and selecting appropriate anti-corrosion measures can improve the service of oil tanks Reducing the incidence of oil tank accidents is very important.
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, etc. engaged in coating anti-corrosion work, providing a certain reference for these personnel units basis。 | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Part | Outdoor environment | |||
| Service life | Over 25 years | |||
| Surface Treatment | Thoroughly remove rust from manual and power tools to St2 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no loosely attached oxide scale, rust, coating, or foreign impurities. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaCover | Graphene low surface treatment primer KnkaCover 220 Gns | 20：5 | 200μm |
| Step 2 | KnkaDur | ref="goodlink_MN-D-10001.html">Hardtop AS KnkaDur 550 | 20：5 | 60μm |
| Design total thickness | 260μm | |||
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, etc. engaged in coating anti-corrosion work, providing a certain reference for these personnel units basis。 | |||
|---|---|---|---|---|
| Corrosion environment | C5 high corrosion | |||
| Part | Outdoor environment | |||
| Service life | Over 25 years | |||
| Surface Treatment | Thoroughly remove rust from manual and power tools to St2 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no loosely attached oxide scale, rust, coating, or foreign impurities. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Buildings and areas where condensation and high staining continue to occur and exist. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Graphene zinc foundation make-up KnkaZinc 60 Gns | 15：3 | 80μm |
| Step 2 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 15：3 | 120μm |
| Step 3 | KnkaDur | Hardtop AS KnkaDur 550 | 15：3 | 40μm |
| Total Thickness | 240μm | |||
Steel pipe piles are generally used as foundations for offshore structures such as bridges, ports, and offshore platforms, and they are subject to severe corrosion environments. Due to severe ocean corrosion In the environment, steel pipe piles often have a significant risk of corrosion. With the increasing attention to the severity of corrosion and the deepening of sustainable development concepts, significant results have been achieved. Port terminals often use steel sheet piles or steel pipe pile structures. The harsh seawater environment causes severe corrosion to steel piles. Improper material selection, unreasonable design, and lack of protective measures often result in premature maintenance and reinforcement of the terminal, and even scrapping.
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, etc. engaged in coating anti-corrosion work, providing a certain reference for these personnel units basis。 | |||
|---|---|---|---|---|
| Corrosion environment | CX Extreme Corrosion | |||
| Part | Indoor Environment | |||
| Service life | 7-15 years | |||
| Surface Treatment | Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and corrosive atmosphere. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Graphene zinc foundation make-up KnkaZinc 60 Gns | 22.5 : 2.5 | 80μm |
| Step 2 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 24：2.4 | 180μm |
| Step 3 | KnkaDur | Hardtop AS KnkaDur 550 | 18：2 | 60μm |
| Total Thickness | 320μm | |||
| Reference basis | The ISO ISO 12944-2017 is a standard compiled by the International Organization for Standardization for owners, designers, consultants, coating construction units, coating manufacturers, etc. engaged in coating anti-corrosion work, providing a certain reference for these personnel units basis。 | |||
|---|---|---|---|---|
| Corrosion environment | CX Extreme Corrosion | |||
| Part | Indoor Environment | |||
| Service life | 7-15 years | |||
| Surface Treatment | Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. | |||
| Thoroughly spray rust removal to Sa2.5 level (ISO) 8501-1:2007), when observed without magnification, the surface should be free of visible oil, grease, and dirt, and there should be no oxide scale, rust, coating, or foreign impurities. Any residual traces of pollutants should only appear as slight color spots in the form of dots or stripes. Painting area | Marine areas with high salinity and tropical subtropical industrial areas with extremely high humidity and corrosive atmosphere. | |||
| coating | Type of coating | Paint name | Ratio | Dry film |
| Step 1 | KnkaZinc | Graphene zinc foundation make-up KnkaZinc 60 Gns | 15 : 3 | 80μm |
| Step 2 | KnkaCover | Epoxy micaceous iron intermediate paint KnkaCover 150 | 15：3 | 180μm |
| Step 3 | KnkaDur | Hardtop AS KnkaDur 550 | 15：3 | 60μm |
| Total Thickness | 320μm | |||
Scan wechat