Aerospace series - Paints and varnishes - Corrosion resistant chromate-free two component cold curing primer - Part 004: High corrosion and fluid resistance with surface preparation tolerance

This technical specification outlines requirements for a two-component, cold-curing primer paint system designed for aerospace applications. The formulation is specifically engineered to provide high levels of corrosion resistance without the use of chromium compounds, aligning with modern environmental and safety considerations in the aviation and space industries. It addresses the performance criteria for coatings that must withstand exposure to various liquids while maintaining structural integrity over extended periods. The document details the necessary surface preparation tolerances required before application to ensure optimal adhesion and long-term durability of the protective layer. It covers testing methods and acceptance criteria for both the liquid state and the cured film properties. The scope includes the definition of chemical composition, application procedures, and quality control measures essential for manufacturing consistent products. By establishing clear benchmarks for corrosion resistance and fluid compatibility, this standard serves as a reference for manufacturers and aviation authorities to verify the suitability of primer systems in demanding operational environments.