The surface of color stainless steel plate has been treated with three layers of protective film. However, during the installation, if the cement slurry is mixed improperly and the cement slurry is too thin, the cement slurry will flow out from the gap and will not dry for a long time, and the cement slurry will splash on the surface of door plate. If it is not treated for a long time, the color of color stainless steel surface will be corroded and the original color of color stainless steel plate will be exposed. In addition, if acid and alkali substances are attached for a long time without treatment, the surface color of color stainless steel will react with these substances, resulting in corrosion and discoloration.

The surface of color stainless steel plate has been treated with three layers of protective film. However, during the installation, if the cement slurry is mixed improperly and the cement slurry is too thin, the cement slurry will flow out from the gap and will not dry for a long time, and the cement slurry will splash on the surface of door plate. If it is not treated for a long time, the color of color stainless steel surface will be corroded and the original color of color stainless steel plate will be exposed. In addition, if acid and alkali substances are attached for a long time without treatment, the surface color of color stainless steel will react with these substances, resulting in corrosion and discoloration.