As published by Market Prospects in “What is the Reason for Surface Treatment of Metals?,” surface treatment is used as a finishing step to improve appearance and add protection that helps metal components perform reliably and resist rust.

Copper is used as a simple example of why this matters: parts can darken after processing because oxygen in the air causes oxidation, forming copper oxide (2Cu + O₂ = 2CuO), which can trigger rework and added cost. Passivation is described as creating a chemical conversion film that is not easily affected by touch while preserving conductivity, weldability, and the workpiece’s dimensions. The outlined flow includes pre-treatment to remove oil stains or oxidation, optional polishing for brightness, immersing the workpiece in passivation solution for about five minutes, then rinsing and drying. Surface treatment is also described more broadly as including methods like mechanical polishing, chemical treatments, surface heat treatments, and surface coatings, along with steps such as cleaning, deburring, degreasing, and descaling.

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Article with all rights reserved, courtesy of Market Prospects —- https://www.market-prospects.com/