Passivation is the process of making a material “passive”, usually by the deposition of a layer of oxide that adheres to the metal surface. Passivation affects the properties of almost all metals; prominent examples being aluminum, zinc, titanium and silicon. With regard to corrosion, passivation is the spontaneous formation of a hard non-reactive surface coating that inhibits further corrosion. This layer is generally an oxide or a nitride layer, a few nanometers thick.
Specialized companies manufacture a comprehensive range of Industrial Degreasing Equipment for the washing of industrial parts that deliver unparalleled precision cleaning for all types of component parts. Degreasing equipment is both sold and hired out by these specialized companies. Aqueous based component degreasing equipment is suitable for a wide range of industries including; Aerospace, Automotive, Remanufacturing, Rail, Heavy Industry, Recycling, Oil and Gas, Printing and General Engineering. Degreasing equipment can be designed to suit virtually any production requirement, batch or continuous, simple wash to wash, rinse and dry and electric or gas fired. Detergent concentration monitoring and dosing, oil removal systems, advanced filtration systems and RLC control are just some of the features that can be incorporated into the machine designs. Vapor degreasing machines are also very popular. They are a genuinely safe alternative to solvent cleaning.
Normally stainless steel is resistant to surface attacks in mildly corrosive environments. When corrosion does occur, pits form on the surface or within details of the component. In order to prevent it, stainless steel passivation is carried out to protect it from corrosion and oxidation. Stainless steel passivation removes free iron or iron compounds from a stainless steel surface with the use of chemicals. To passivate stainless steel; typically an acid solution such as nitric acid or citric acid that removes the surface problem but doesn’t affect the stainless steel itself is used. If the iron and foreign particles are not removed, they will appear as rust or oxidation. Passivation will dissolve the particles and allow a thin permanent film to form on the surface. To passivate stainless steel surfaces, one can approach many of the specialized companies that dedicate themselves to it. Many of them have online portals and comply with US stainless steel passivation standards.
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