Cast iron anti-corrosion treatment process for elastic couplings

Due to the unique manufacturing process, the surface of flexible coupling castings is prone to rusting, making it difficult to treat after rusting. If not taken seriously, not only will the rust prevention ability of the workpiece be poor, but also the decorative quality will be poor.

Therefore, many enterprises require castings (cast iron, cast steel) to undergo special rust prevention treatments for elastic coupling such as room temperature blackening and phosphating according to their different working conditions, while also requiring higher corrosion resistance requirements for castings. The difference between cast iron parts and other steel parts lies in their loose structure and high carbon content. If handled improperly, it will directly affect the bonding strength between the black film and the substrate. Therefore, preprocessing is particularly important. The simple rust removal method for steel castings is to use sandpaper.

The room temperature blackening process for elastic coupling iron castings is a low-cost and simple surface treatment method for blackening iron castings. This process can give cast iron castings a pure and elegant black appearance, improve their rust resistance, and thus increase the value of the product. Therefore, this process can be widely applied to anti-corrosion treatment of cast iron, continuously improved and innovated in production practice. After pickling and neutralization, the elastic coupling casting can be soaked in solution for about 4 hours to remove rust on the surface of the steel casting.