Fastener surface treatment
Fasteners generally need to be surface treatment, fastener surface treatment of many types of commonly used are electroplating, oxidation, phosphating, non-electrolytic zinc coating treatment. However, electroplated fasteners account for a large proportion of the actual use of fasteners. Especially in the automotive, tractors, home appliances, instrumentation, aerospace, communications and other industries and fields more widely used. However, for threaded fasteners, the use of not only requires a certain degree of corrosion resistance, but also must ensure that the interchangeability of threads, also referred to here as the coupling. In order to meet the threaded fasteners in the use of the requirements of the "anti-corrosion" and "swap" dual use of performance, the development of special plating layer standard is very necessary.