TIS 1092-2005 "Etching Coating" specifies the technical requirements, performance standards and application specifications of etching undercoating (Etching primer). Etching Coating is mainly used for pretreatment of metal surfaces, which can effectively enhance the adhesion of coatings to metal substrates and improve anti-corrosion performance. The standard details the performance requirements of Coating composition, adhesion, corrosion resistance, abrasion resistance and environmental friendliness, and specifies the coating process, construction conditions, film thickness, etc. Through the implementation of this standard, it aims to ensure the mass of etching Coatings, improve the protective effect of Coatings, promote the technological progress and standardized development of the Coatings industry, and meet the needs of industrial products for high-performance coatings.