Citric Acid Passivation of Stainless Steel Used in Aerospace Applications

September 27, 2019

Stainless steel is used in many aerospace applications because it is able to maintain its structural integrity over a wide temperature range while remaining chemically inert (passive), resisting corrosion and high-temperature oxidation. There are a number of different grades of stainless steel. They are all primarily alloys of iron, chromium and nickel in different combinations…

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Posted by Mary Cheng Category: Blog
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What is the Passivation Process?

August 12, 2019

As defined in MIL-STD-753C, the Passivation process is the final treatment/cleaning process used to remove iron from the surface of corrosion resistant steel parts such that a more uniform formation of a passive surface is obtained thus enhancing corrosion resistance. Stainless steel is different from other metals in that as you get closer to the surface…

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Posted by Jeff Wassenaar Category: Blog
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Is Electropolishing Necessary?

June 24, 2019

It depends on what the desired outcome is. Chemical passivation will attain a chrome to iron ratio above 1.0 (Cr/Fe), without producing any measurable change in the finish characteristics of the surface while Electropolishing (EP) is designed to remove surface damage from mechanical polishing (MP) and produce a more cleanable featureless smooth surface finish (Fig….

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Posted by Daryl L. Roll Category: Blog
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Does FSMA Have You Questioning Your Quality Protocols?

June 5, 2019

What Is the Food Safety Modernization Act? Congress passed the Food Safety Modernization Act (FSMA) in 2011 to an increase in reported incidents of foodborne illnesses in the preceding decade. The FSMA requires many manufacturers and transporters in the food and beverage industry (including breweries and wineries) in many cases to comply with current good…

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Posted by Seth Matthews Category: Blog
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Frequently Asked Questions About Electropolishing

May 7, 2019

Did you know you can perform vessel reconditioning on-site? There are several reasons to evaluate this process. On-site reconditioning reduces downtime when you compare it to the replacement of a vessel. It doesn’t require re-validation of the vessel since you only need to treat the surface of the existing vessel. You can monitor the progress…

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Posted by Mike Montgomery Category: Blog
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Can Wine Be Used For Passivation?

November 7, 2017

The making of wine is both a science and an art. From growing the grapes through the bottling of the final product, winemakers use careful techniques to protect the taste of their delicate product. Traditions and secret techniques are passed on through generations of winemakers. A vintner knows that proper care and maintenance of his…

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Posted by Daryl L. Roll Category: Blog
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Cleaning, Derouging, Passivation Treatment Process

December 13, 2016

This video takes you inside the distribution piping of a typical water system to see the Cleaning, Derouging, and Passivation treatment process. This video will demonstrate the treatment process of a typical system and show how passivation can improve the corrosion resistance. Passivation Treatment Process Rouge Formation – • Rouge crystals form on surface of…

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Posted by Mike Montgomery Category: Blog
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Ask expert, Daryl Roll, P.E., your cleaning & passivation, chemical processing or corrosion control questions on his new blog today!

July 8, 2014

Passivation is an acid treatment process that yields improved corrosion resistance to stainless steel surfaces. Passivation may also be used on other materials where removing iron from the surface is required or beneficial. Astro Pak Corporation has over 60 years of experience in passivation, precision cleaning and cleanroom operations. Astro Pak’s extensive scientific research developed…

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Posted by Daryl L. Roll Category: Blog
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