1. In industrial applications, the electrogalvanizing process will precipitate on the cathode compared to electrogalvanizing.
Hydrogen, which produces hydrogen permeation on high-strength steel and other materials, results in high-strength steel parts causing hydrogen embrittlement and fracture during use, which causes serious accidents, which occur at home and abroad. Mechanical galvanizing does not cause hydrogen embrittlement damage to high-strength steel parts. The advantage of this function is that electro-galvanizing is incomparable. In addition, the mechanical galvanizing operation is simple, the barrel plating of small parts is easier to control, the energy consumption is small, the plating speed is fast, and the coating of 50 um thickness can be completed in 0.5 h, and the production efficiency is high.
2. Compared with hot dip galvanizing, hot dip galvanizing is used in large steel parts as a long-term outdoor defense.
Protective coatings, but the standard fasteners used outdoors are basically hand-operated, plus the characteristics and requirements of the hot dip galvanizing process, or mechanical galvanizing is more convenient. In addition, when the hot-dip galvanized gaskets are small parts, the parts are easy to stick together; when the threaded parts are plated, the molten zinc will block the threads; the plated nuts must be re-threaded after plating; and the hot dip galvanizing is energy-consuming process, which requires high temperature operation, harsh environment and serious environmental pollution.
Functionally, hot-dip hot dip galvanizing will cause annealing to soften the surface of the quenched high-strength steel fasteners, affecting the quality of the plated parts and changing the original performance, thus becoming a substandard product.
The mechanical galvanized layer also has the function of resisting atmospheric acid rain. Its experimental acid resistance is the three places of hot dip zinc coating. This characteristic is also outstanding.