HB/Z 108-1986 (English Version) PDF

Scope: WZL coating is an inorganic coating formed by spraying and solidifying WZL coating composed of phosphate, chromate and aluminum powder. It is suitable for aviation product parts (assemblies) such as stainless steel, low alloy steel and high strength steel. The protection can effectively prevent various corrosion of these materials in the atmosphere below 600℃ for a long time. There are basically four types of this coating. Class I coating is obtained after curing at 350±10℃. Class I coating is a barrier coating and is suitable for occasions with low protection requirements. After curing, different post-treatment methods can be used to obtain three types of coatings: II, III, and IV. Among them, the two types II and IV are conductive. For ferrous metal substrates, they are sacrificial anode coatings with Better electrochemical protection ability. Class III coating is a comprehensive coating with Class IV coating as the bottom layer and Class I coating as the top layer. The user should select the applicable coating type based on the different needs of the product and the physical properties and technical conditions of the metal material, and adapt the coating heat treatment temperature to the heat treatment technical conditions of the base material.

HB/Z 108-1986 history