Aerospace series - Chromic - sulphuric acid pickle of aluminium and aluminium alloys

This technical specification outlines the procedures for the sulfuric acid anodizing of aluminum, chromium, and aluminum alloys within the aviation and aerospace sector. It establishes essential quality requirements and test methods to ensure surface layers meet the rigorous demands of flight applications. The document details the preparation of materials, the composition of the anodizing bath, and the control of operational parameters such as voltage, temperature, and duration. It specifies how to verify the coating thickness, corrosion resistance, and electrical properties through standardized testing protocols. Adherence to these guidelines ensures consistent performance and reliability of components used in aircraft and spacecraft systems. The text provides clear definitions for various surface treatments and inspection techniques, facilitating uniform manufacturing practices across different facilities and regions. By following these established rules, industries can maintain high standards of safety and durability in their products.