The causes for brittle fracture during the assembly and service of galvanized steel bolts are analyzed from materials

heat treatment process and surface treatment process. The effect of the hydrogen deposition and infiltration during galvanizing on the brittle fracture of steel bolts is emphatically analyzed in order to take necessary measures in the respects of selected materials

manufacturing process control and so on to reduce the hydrogen adsorption and osmotic pressure on parts surfaces

decrease their sensitivity to hydrogen embrittlement and effectively prevent the brittle fracture of galvanized steel bolts.