Cast basalt valve manufacturers analyze the color change of cast basalt pipe after galvanizing treatment

The manufacturer of cast basalt valve explains that the cast basalt pipe will generally be galvanized. The purpose of galvanized cast basalt pipe is actually cast basalt pipe. In order to make the plate anticorrosive and protect the appearance of the plate, after galvanizing, not only the plate is protected, but also the color of the plate has changed. What changes have taken place in color?

1. After galvanizing, the surface color of cast basalt pipe is usually silver white. Because zinc is silver white, of course, some will be painted and turn blue. The purpose of galvanizing is to smooth the surface and prevent rust.

2. If the plate is made of iron, it will rust after galvanizing, which may be the principle of absorbing anode and protecting cathode in anti-corrosion.

3. In order to improve the anti-corrosion ability after zinc plating, passivation process after zinc plating is also needed. The color of the cast basalt pipe is yellow or light yellow when it is just galvanized, and then it will turn silver white through a nitric acid film removal process.

4. After the film removal is the passivation process. After the passivation process, different colors such as blue, white, multicolored, black and even yellow may be produced.

After galvanizing, the color of cast basalt pipe becomes silver white. Galvanizing process plays a very important and key role in prolonging the service life of plates. Although the color has changed, the essence of the plate has not changed. The change of color will not affect the quality of the plate and people's choice of it. These color changes can also be skillfully used to customize plates of different colors for different users.