If the zinc coating is good, but in 3% nitric acid when the light, the coating has dark shadow, passivation occurs when the film is brown, may be caused by foreign metal impurities such as copper or lead in the galvanizing liquid. When problems occur in the process of galvanizing large coil galvanized wire, the temperature and current density are checked first, and then the content of zinc and sodium hydroxide in the plating solution is measured and adjusted through the analysis of the plating solution. Whether DPE content is low can be determined by hull cell test.

And for the external insulation system is used in the brick veneer, as for the role of first should also be anti fall off followed by anti cracking, so should choose the grid 10×10×0.6, these are some experience choice, grid conversion from the national regulations of steel mesh specifications, using steel level conversion. The index of wire mesh size, wire warp, square meter steel content, galvanized amount, etc., mainly consider the corrosion resistance of wire mesh and the safety of the system! Galvanized wire mesh is more critical than wire diameter, galvanized amount is very important, must be hot plating, welding after plating is better than plating after welding, as for wire diameter, comprehensive consideration of site construction and to meet the needs of safety, 0.6 ~ 0.7 is better.

2. If the surface of the stainless steel pet cage is adhered to organic juice (such as melon, vegetable, noodle soup, phlegm, etc.), in the case of water and oxygen, it constitutes organic acids, and the corrosion of organic acids on the metal surface for a long time.