China s National Anti Corrosion Coating Coating Standard

Hello Anti-corrosion coating refers to a kind of covering layer that is applied to the metal surface to isolate it from the surrounding medium to control the corrosion loss of pipelines. It should have good electrical insulation and water insulation, strong adhesion to the surface of the pipe, chemical damage resistance and certain mechanical strength. Anticorrosive coatings are often composed of three parts:

The first layer is a primer applied to the surface of the metal to enhance the adhesion of the metal to the main coating; The second layer is the main coating, commonly used materials are coal tar enamel, petroleum asphalt, polyethylene adhesive tape, epoxy resin, polyolefin coating, etc., in recent years, the latter two are used more abroad; The third layer is a bandage to maintain a certain mechanical strength to protect against damage during transportation and construction. After the coating is completed, the belt must be subjected to a series of tests such as impact resistance, peel resistance and electrical insulation, and only those who pass the test can be put into use.

The role of anticorrosive paint is very large, which can make the life of the use longer, but the standard and the aspects that need to be paid attention to should be particularly cautious about the anticorrosive paint, and the pickpocketing is clever to avoid unnecessary trouble. So what are the national standards for 8710 anticorrosive paint, and what should be paid attention to in the use of anticorrosive paint, do you understand? Now let's take a look.

1. What are the national standards for Douchun 8710 anticorrosive paint?

1. Before brushing anticorrosive paint, the ground material needs to be dusted and degreased; 2. When using anticorrosive paint, it should be mixed with the curing agent in a certain proportion and placed for about 10 minutes for construction; 3. The environment of anticorrosive paint construction needs to be controlled at more than 15 degrees; 4. Anticorrosive paint should be used within the shelf life, and should not be used beyond the shelf life.

Second, what should be paid attention to in the use of anticorrosive paint.

1. Before painting anticorrosive paint, you need to confirm whether the anticorrosive paint you choose will cause damage to the human body, and you need to take necessary protective measures during construction. Furthermore, the construction of anticorrosive paint cannot be mixed with other items, otherwise it is very likely to lead to other accidents and increase unnecessary trouble.

2. For the items ready for the construction of anticorrosive paint, it is necessary to ensure that there will be no excess impurities and dust on the surface, as long as the construction requirements are met, otherwise the painting effect will be greatly reduced, so that the anticorrosive effect can not be played to the best state, so special attention should be paid to the cleaning process.

3. During construction, construction management should do a good job of strict protection. The quality of anticorrosive paint can not be problematic, to avoid the reduction of the painting effect, so the usual preservation must be reasonable. Then there is the construction process, the attitude of the construction personnel is also particularly important, and no corners must be cut, otherwise the role of anticorrosive paint will be reduced.

What are the national standards for 8710 anticorrosive paint, and what should be paid attention to in the use of anticorrosive paint, which is introduced here, do you understand? The use of anticorrosive paint is recognized by most people, but it is necessary to pay attention to the construction process, otherwise it will reduce the overall painting effect.

When it comes to steel structure anticorrosive coating standards, at this stage, what are the regulations on steel structure anticorrosive coating standards in China, and what is the basic situation? The following is a basic introduction to the anti-corrosion standards for steel structures in construction terms

Basic provisions of steel structure anticorrosive coating standards:

Code for Acceptance of Construction Quality of Steel Structure Engineering GB50205-2001 Section 14 "Steel Structure Coating Engineering" in the main control project: coating, coating times, and coating thickness should meet the design requirements. When the design does not require the coating thickness, the total thickness of the coating dry paint film:

It should be 150 m outdoors and 125 m indoors, with a permissible deviation of -25 m. The permissible deviation of the dry film thickness per pass is -5 m.

Number of inspections: 10% of the number of components shall be randomly checked, and there shall be no less than 3 components of the same kind.

Inspection method: Check with dry paint film thickness gauge. Each component is inspected in 5 places, and the value at each place is the average of the dry paint film thickness of the coating coating at 3 measuring points 50 mm apart.

Steel Structure Anticorrosive Coating Standards:

The national standard GB8923-88 "Steel Surface Modification Grade and Rust Removal Grade Before Painting" divides the rust removal grade into three types: jet or projectile rust removal, manual and power rust removal, and flame derusting

1) Spray or projectile positive annihilation rust removal, represented by the letter "sa". There are four levels:

SA1 mild spray or projectile rust removal. There is no visible grease or dirt on the surface of the steel, and there are no build-up materials such as oxide scale, rust and paint coating that are not firmly adhered to.

SA2 is thoroughly sprayed or projectile to remove rust. The surface of the steel should be free of visible grease and dirt, oxide scale, rust and other attachments have been basically removed, and its residue should be firmly attached. The ejection dent formed after the steel surface is evenly distributed and touched by the shot blasting, and the anti-slip coefficient is reached.

Very thorough spray or projectile rust removal. The surface of the steel should be free of visible build-up such as grease, dirt, scale, rust and paint coating, and any remaining traces should be only slight spots in the form of spots or strips. The surface of the steel is evenly arranged with the projectile dents formed after shot blasting, and the anti-slip coefficient is reached.

SA3 makes the steel appear clean by jetting or projectile rust removal. The surface of the steel should be free of visible build-up such as grease, dirt, scale, rust and paint, and the surface should show a uniform metallic luster.

2) Manual and power rust removal: represented by the letter "ST", divided into two grades:

ST2 thoroughly derusts by hand and power. There is no visible grease and dirt on the surface of the steel, and there are no build-ups such as oxide scale, rust and paint coating that are not firmly adhered to.

ST3 is very thorough for manual and dynamic rust removal. The surface of the steel should be free of visible grease and dirt. And there are no adhesions such as oxide scale, rust and paint coatings that are not firmly adhered to. Rust removal is more thorough than ST2, and the surface of the exposed part of the substrate should have a metallic luster.

3) Flame rust removal, represented by the letter "F1", which includes the removal of the products attached to the steel surface after heating with a power wire brush after the flame heating operation. There is only one level:

The surface of the F1 steel should be free of build-up such as scale, rust and paint coating, and any remaining traces should only be surface discoloration (dark shadows of different colors).

Anti-corrosion coating equipment includes the following:1Spray guns:

It is used to spray paint on surfaces that need to be protected from corrosion. 2.Paint Spraying Machine:

A high-speed rotating spray head is used to evenly spray paint onto the surface. 3.Brushes and rollers:

It is suitable for painting small areas, such as construction corners or areas that are difficult to first or reach. 4.Sandblasting Machine:

It is used for surface treatment to remove impurities and old paint from the surface and provide a clean basis for subsequent coating. 5.Drying equipment:

It is used to accelerate the hard collapse and curing of coatings, and improve the quality and durability of coatings. 6.Washing equipment:

It is used to clean coating equipment and surfaces to ensure that the paint is evenly applied to the surface. The above are common anti-corrosion coating equipment, according to specific needs, different working scenarios may require different equipment groups.

Dear, hello, I'm glad to answer for you yo [spine is not shy], what are the anti-corrosion coating equipment as follows 1Spraying equipment: Spraying equipment generally includes spray guns, compressed air spraying machines, airless spraying, etc., which can be applied to the surface treatment of anti-corrosion coatings of various shapes.

2.Sand pump equipment: Sand pump equipment is mainly used for rust removal on the surface of steel structures, and the dirt and rust on the surface of objects can be removed by spraying high-speed sand particles.

3.Shot blasting equipment: Shot blasting equipment can spray high-speed projectiles to remove rough debris such as rust, oxide and concrete from the surface and make the surface smoother.

4.Baking equipment: The baking equipment can quickly dry the anti-cherry sail anti-corrosion coating and make the coating more uniform and firm.

5.Coating Film Thickness Tester: The coating film thickness tester can accurately measure the coating thickness to ensure that the anti-corrosion coating can achieve the expected anti-corrosion effect.

The above is a common anti-corrosion coating equipment, but the specific equipment used will vary depending on the material, shape and accuracy of the anti-corrosion coating. I hope the above reply is helpful to the kiss.

Conventional anticorrosive coatings can generally prevent the metal from being corroded and prolong the service life of the metal, while heavy anticorrosive coatings can be more durable in corrosive environments and situations. Therefore, the use rate of anticorrosive coatings in our daily life is very high. What are the specific characteristics and testing standards of anticorrosive coatings?

Let me introduce you to the specific content.

Specific properties of anticorrosive coatings

1. Corrosion resistance.

Anti-corrosion coatings can be used in environments that are prone to corrosion, and they can keep things from being corroded. To put it more concretely, for example, in the construction of a sea-crossing bridge, the metal on the piers is coated with anti-corrosion paint under the harsh conditions of seawater, which can extend the use of the metal by more than 10 or more years. The harsh environment we are talking about here is also in the chemical, atmospheric or marine environment.

2. Thick film standardization.

The standard of thick film for general anti-corrosion materials is about 100 m or 150 m. Heavy anticorrosive coatings are required at 300 m or more. Within the range of this standard, it has the best antiseptic effect.

3. Convenience.

Anti-corrosion only paint is very efficient and convenient to use, and the use method is very flexible. When the temperature is not very low above 20 degrees Celsius, and the humidity is about the same, its fixed-line speed is very fast. Painting for a day or two can usually be used for other projects, such as handling or cutting.

Some anticorrosive coatings can also be used in conjunction with other industrial paints to improve our construction efficiency.

Specific characteristics and testing standards of anticorrosive coatings.

Testing standards for anticorrosive coatings

1. Detection of coating adhesion.

Film adhesion, as the name suggests, is the degree to which the anticorrosive coating adheres to the material. We can starve at the surface of the material and scrape or slide it with a knife to see what the result is. The general methods for measuring the adhesion of the coating film include the circle method, the grid method, and the pull method.

2. Detection of film thickness.

I mentioned the standard for thick film earlier: the standard for thick film for general anti-corrosion materials is about 100 m or 150 m. Heavy anticorrosive coatings are required at 300 m or more.

Within the range of this standard, it has the best antiseptic effect. Therefore, it is very important to detect the post-mold. There are two types of measurement methods: destructive testing and non-destructive testing.

Use both methods to test whether the thickness is within the standard range.

That's all I have to say, I hope it can help you

Uh、、、 go to the National Standards Committee to check it out.

Quality requirements for anticorrosive coating substrate:

1.The quality of the concrete base is required to be smooth and compact, no shelling, sanding, cracks, hemp surface, etc., its strength is not less than C20, the flatness is generally required to be within the range of 2m, the drop is not more than 2mm, the moisture content is not higher than 6%, the damaged concrete surface is repaired or leveled according to national standards, the large area of concrete base is treated with expansion joints according to the design requirements, the surface treatment grade of the steel structure base base should meet the provisions of the national standard, and the surface is free of grease, dirt, oxide scale, rust and coating layer, etc. The moisture content of the wood base shall not be greater than 15%, the surface is basically flat, and there is no oil stain, dust pollution, knots, etc.

2.The quality requirements of the coated anti-corrosion coating products, the anti-corrosion coating products are mainly perchloroethylene paint, chlorinated rubber paint, chlorosulfonated polyethylene paint, epoxy resin paint, polyurethane paint and high chlorinated polyethylene paint, etc., and the performance of the product must meet the design requirements.

Quality acceptance of anti-corrosion coating engineering

1.The quality acceptance of the anti-corrosion coating engineering should be accepted according to the provisions of the national standards after the expiration of the coating curing period.

2.The number of anti-corrosion coating coating times: the coating thickness should meet the design requirements, and the acceptance of the acceptance should be 10% according to the number of components, and the same kind of components should not be less than 3 pieces, each component is detected in 5 places, and each value is 3 measuring points 50mm apart to take the average value.

The adhesion of the coating is randomly checked by 10% according to the number of components, and there should be no less than 3 components of the same kind, and 3 places are measured for each piece. The number of inspections for the quality of the coating surface is a safety spot-check, and the markings, markings and numbers of the components should be clear and complete.

3.The requirements for the quality acceptance of anti-corrosion coating engineering should comply with the regulations.