In physical chemistry and engineering, passivation is coating a material so that it becomes "passive", that is, less readily affected or corroded by the environment.

Passivation is a widely-used metal finishing process to prevent corrosion. In stainless steel, the passivation process uses nitric acid or citric acid to remove free iron from the surface. The chemical treatment leads to a protective oxide layer, or passivation film, that is less likely to chemically react with air and cause corrosion.

2023年9月26日 · What Is Passivation? Passivation is a post-fabrication process that makes a material passive or inert to chemical reactions that can change its composition and ultimately lead to failure.

2025年1月19日 · Passivation is a process that enhances the performance, durability, and longevity of materials, particularly metals, by reducing their surface reactivity. This is achieved by forming a thin, protective oxide layer on the material’s surface, which can be naturally occurring or chemically induced.

2024年5月9日 · Explore the essence of passivation, a pivotal technique in metalworking that bolsters material longevity and shields against corrosion. This article delves into the process of passivation and its applications in engineering and manufacturing.

2024年7月19日 · Passivation involves applying an outer layer to a material to protect it from harmful reactions such as corrosion reactions. The layer may occur spontaneously in nature through a process called self-passivating, or it can be introduced to the material as a …

2023年10月23日 · Stainless steel passivation is a non-electrolytic finishing treatment that renders stainless steel products unreactive to substances that cause rust, including oxygen and moisture. The passivation process involves submerging stainless steel in mild oxidants like nitric acid to create a thin Chromium Oxide (2Cr203) layer on its bare surface.

Passivation is the loss of chemical reactivity experienced by certain metals and metal alloys under particular environmental conditions. The metals or alloys become inert and act as if they are noble metals (e.g., platinum and gold).

2024年6月18日 · Passivation is an essential process in engineering that aims to create a protective layer on materials to prevent corrosion and enhance durability.

2024年10月22日 · Passivation is a post-manufacturing process that is performed after welding, grinding, cutting and other machining operations. This technique puts a protective layer on metals to stop rusting. It works by using chemical or electric reactions to …