What is the term for a chemical process that provides a corrosion-resistant finish to a medical instrument?

Passivation is the correct term for a chemical process that provides a corrosion-resistant finish to a medical instrument. This process involves treating the metal surface, typically stainless steel, with an acid solution that removes free iron and enhances the formation of a protective oxide layer. This oxide layer significantly reduces corrosion and improves the longevity and reliability of the medical instruments in sterile environments.

The other choices refer to different processes. For example, coating generally refers to the application of a protective layer but does not specify a chemical process that creates a corrosion-resistant surface. Galvanization involves coating a metal, usually iron or steel, with a layer of zinc to prevent rusting, but it is not specific to stainless steel instruments used in medical settings. Chroming, or chrome plating, is a process that applies a thin layer of chromium to an object, which can provide a shiny finish and some degree of protection against corrosion, but it is less favorable in medical instruments compared to the passivation process.