For the surface coating of steel metal substrates, poor impermeability and poor adhesion of the coating film are serious defects. The defects such as pores, pinholes, shrinkage cavities, cracks, etc. of the coating film itself are channels through which steel corrosion medium (water, oxygen, electrolyte ions) penetrates, and these channels reduce the impermeability of the coating film.When the oxygen and electrolyte ions are dissolved in water, they will travel through the coating film with the liquid water. When designing anti-corrosion coatings, the wet adhesion is considered as the primary condition in terms of mechanical properties. The protective life of the paint film is inferred by wet adhesion. Some people say that if there is sufficient wet adhesion, the protection of the coating is indefinite.Therefore, it can be said that factors affecting the wet and dry adhesion of the coating film accelerate the expansion of the rust and increase the corrosion. Therefore, the coating with poor wet adhesion of the coating film cannot be coated before it is improved, so as to avoid causing more waste.

Sinograce chemical produces anticorrosive coating and anti rust coating for metal surfaces.

visit us sinograce chemical: https://www.sinogracechem.com

Get a Quote Now :sales@sinogracechem.com

Telephone               :+86 0551 63459511