Characteristics and application of high strength hot dip galvanized bolt
High strength hot dip galvanized bolt is a typical anodic coating, which is mainly used to improve the corrosion resistance of base material. Because its coating thickness is thin, it is mainly used for surface corrosion protection in general environmental conditions.
High strength galvanized bolts by chromate passivation treatment, its corrosion resistance is greatly improved, high strength galvanized bolts, hot galvanized screws can be used for protective layer with excellent outdoor neutral playing, but corrosion in harsh industrial atmosphere and coastal climate is relatively poor performance.
The surface treatment method and process technology of high strength hot-dip galvanized bolt and hot galvanized screw have low cost, stable and reliable process and convenient use. However, hydrogen embrittlement is very easy to occur, so high strength hot dip galvanized bolts and hot galvanized screws should be carried out in time for hydrogen removal. In addition, the acid and alkali resistance is poor, the corrosion prevention time is short, and the process is low environmental protection.