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Surface Chemistry Improvements on 316L Stainless Steel Weld

From Astro Pak Corporation

Passivation of austenitic stainless steel surfaces has been practiced on high purity water systems for many years, and is
generally defined as the removal of iron and iron compounds from the surface to improve the passive film and increase
corrosion resistance. The surface chemistry, structure and related corrosion resistance of austenitic stainless steel is affected
by mechanical polishing, welding, and most fabrication techniques. Passivation reduces or eliminates this damage
while forming a more corrosion resistant passive film higher in chromium oxide. There have been many technical papers
that have presented evidence on effectiveness of passivation and especially for the benefits of citric chelant processes 1,
2, 3.

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Astro Pak Corporation - Ultra Pass® Passivation
We didn't invent chelant passivation, we're perfecting it. (read more)
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Topics of Interest

Mohamed Saleem and Sowmya Krishnan, and Dafna Beery and Aleks Kabansky, involves the use of many corrosive and reactive gases, including hydrogen chloride, hydrogen bromide, hydrogen fluoride, and...

Passivation is a chemical process that is used to help restore contaminated stainless steel to original corrosion specifications. Parts are placed in baskets and submersed into a diluted nitric acid...

3.5 Common Metals and Alloys Used in Biomedical Applications 3.5.1 Surgical Implants All the metals and alloys used for surgical implants rely on the development of a passive oxide film to...

Because of the large number of corrosive and reactive gases used in semiconductor device manufacturing, superior corrosion resistance and moisture dry-down performance are critical parameters of the...

1.4. Stainless Steels In 1988 the United States produced 2.2 million tons of stainless steel, or 2.2% of total steel production (Ref 7, p.147). It was less than alloy steel (10.9%), but when...