How is the Metal Filter Screen Protected Against Corrosion?

Apr. 11, 2020

As a Stainless Steel Wire Mesh Supplier, share with you. There are many ways to prevent metal corrosion, mainly to improve the substance of the metal, to separate the protected metal from the corrosive medium, or to treat the surface of the metal to improve the corrosion environment and electrochemical protection. Covering various protective layers on the surface of the metal to separate the metal from the corrosive medium is an effective way to avoid corrosion. Among them, oxidation treatment, phosphating treatment, non-metallic coating and metal plating are more common methods.

Liquid Filtration Wire Mesh

Liquid Filtration Wire Mesh

Phosphating film is a non-metallic / non-conductive / porous (gap) chemical conversion film, which can suppress the structure of the metal surface to corrode the micro battery, thereby effectively avoiding corrosion and improving the corrosion resistance and adhesion of the coating. Because the metal positive ions hydrate and enter the solution, the surface of the metal accumulates excess electrons, which makes the metal negatively charged, and the hydration ions enter the solution to positively charge the liquid layer next to the metal surface, so that the metal and the solution The interface constitutes an electric double layer. After the formation of the electric double layer, due to the attraction of static electricity, the excess electrons on the metal attract the hydration cations in the solution to the metal. This process is opposite to the charge transfer in the previous process. When the speed of the two processes is the same , A balanced state of charge is established. When the coating area of the metal workpiece is strictly observed, it can be seen that the distance between Cd and the electrode plate is in an inverse relationship. Therefore, in order to enhance the adhesion of the organic coating on the metal substrate, the thickness of the interface transition layer can be reduced.

Silylation technology is harmless to human body and environment, and the treatment liquid can even be discharged directly. However, because silane is unstable in an aqueous solution, it is very difficult to grasp it in reality. The manufacturers who master this skill are very limited, and the skill level varies greatly. Through many years of development, silane skills have overcome the innate deficiencies in the zinc phosphating process that cannot be overcome, and now has a high level of industrial application, which can meet the requirements of the hardware, automotive, household appliances and other industries. The silane process can be applied to the existing phosphating production line. It can be put into operation only by adding a pure water system without any other equipment modification.

As a nano-level metal pre-treatment skill, silane technology does not contain phosphorus and any harmful metal ions, and can achieve collinear treatment of a variety of metal substrates, providing excellent coating adhesion and anti-corrosion functions, and is gradually replacing traditional phosphorus Pre-treatment process. The nano-ceramic chemical conversion film forming a fine structure is deposited on the surface of the China Mesh for Filtration substrate, which has strong barrier properties and has good adhesion to metal oxides and subsequent organic coatings, which can significantly improve the corrosion resistance of metal coating Function, extend the time of corrosion resistance of metal filter.

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