SAE J1974

Description / Abstract: This SAE Recommended Practice is aimed at ensuring high-quality products of anodized aluminum automotive components in terms of durability and appearance. Decorative sulfuric acid anodizing has been well developed over the last several decades in the aluminum industry. Exterior and interior performance demonstrated that parts processed to this document meet long-term durability requirements.

Since the treatment of processing variables is outside the scope of this document, it is important for applicators of this coating to develop an intimate knowledge of their process, and control all parameters that affect the quality of the end product. The use of techniques such as statistical process control (SPC), capability studies, design of experiments, process optimization, etc., are critical to produce material of consistently high quality.

Form

Detailed in this SAE Recommended Practice are interior and exterior bright or electrolytically colored anodized aluminum automotive components in the form of seat trim, dashboard, window or side body mouldings, bumpers, wheels, rocker panel, etc.

Application

This document defines performance requirements for bright or electrolytically colored anodized aluminum finishes including interior and exterior applications. The automotive parts can be fabricated from bare coiled sheet, flat sheet, or extruded shapes. Preanodized coiled sheet may be applicable for selected applications. Alloy selection is governed by finish requirements, forming characteristics, and mechanical properties.