how to choose anti-corrosion coatings?

anticorrosive coating is a coating that is coated on the surface of an object and can form a thin film, which has protective, decorative or other special functions (insulation, rust prevention, mildew prevention, heat resistance, etc.). According to the composition can generally be divided into: epoxy anticorrosive coatings, polyurethane anticorrosive coatings, acrylic anticorrosive coatings, inorganic anticorrosive coatings; perchloroethylene anticorrosive coatings, chlorinated rubber anticorrosive coatings, high chlorinated polyethylene anticorrosive coatings.

In addition, anticorrosive coatings can also be divided into: anticorrosive coatings for pipelines, anticorrosive coatings for ships, anticorrosive coatings for metals, anticorrosive coatings for furniture, anticorrosive coatings for automobiles, anticorrosive coatings for rubber, etc. According to the type of solvent can be divided into: water-based anticorrosive coatings, oily anticorrosive coatings, etc.

In industrial construction, anti-corrosion coating is a kind of water paint commonly used, which is widely used in aviation, shipbuilding, chemical industry, oil pipeline, steel structure, bridge, oil brick well platform and other fields.

need to consider the following factors:

anti-corrosion performance: according to the use of the environment and coating object, select the appropriate anti-corrosion performance of the paint. For example, the marine environment needs to be protected from seawater corrosion, and steel containers in acidic media need to be protected from acid corrosion.

Adhesion: Adhesion is one of the fundamental properties of anti-corrosion coatings, and coatings that do not meet the standards should not be considered.

Physical and mechanical properties: It is necessary to consider whether the coated material is susceptible to impact, impact, friction, bending, pulling, etc. during transportation and use to determine the impact resistance, wear resistance, flexibility, and bending resistance of the anti-corrosion coating. Type and other indicators.

The matching performance of primer and topcoat: anticorrosive coating is usually made up of primer, intermediate paint and topcoat. It is necessary to consider the matching performance between the three, including the interlayer bonding force, whether it will affect the performance of other coatings, etc.

Applicable temperature range: It is necessary to consider the balance between the limit use temperature and long-term use temperature of the coated material and the effective period.

has the construction conditions: the actual coating method and the coating method required by the coating product should be matched. When selecting the coating method, pay attention to the surface treatment level, dilution ratio, coating film thickness, paint surface effect, etc. required by the coating method.

In addition, for some special application scenarios, other factors need to be considered. For example, if the coating needs to withstand ultraviolet radiation for a long time, the anti-corrosion coating with good weather resistance should be selected; if the coating needs to withstand the erosion of chemical substances for a long time, the anti-corrosion coating with good chemical resistance should be selected.

In short, the selection of anti-corrosion coatings need to consider a variety of factors, including the use of the environment, coating objects, anti-corrosion performance, adhesion, physical and mechanical properties, primer and topcoat matching performance, applicable temperature range and construction conditions.