There are four main measures for high-strength Round Head Bolt: chemical composition of raw materials, use environment, contact interface control and structural design. Because high-strength ball-end bolts have special requirements for mechanical properties, chemical composition and structural design, it is impossible to achieve corrosion protection of the fasteners by controlling the material itself and improving the structural design.

Considering the particularity of the living environment of high-strength ball-end bolts, the surface of the high-strength ball-end bolts is protected against corrosion by corrosive and corrosive environments. In order to prevent damage due to corrosion, high-strength ball-end bolts generally need to pass through the surface. Anti-corrosion treatment, high-strength round-head bolt surface anti-corrosion treatment refers to the application of a protective layer on the surface of the high-strength ball-end bolt to isolate it from the corrosive environment, thereby suppressing the generation of the corrosion process. At present, the method of surface treatment of the high-strength ball screw There are many types and the most common ones are surface coating and chemical surface treatment.