Passivation

Chemical Passivation

Why does stainless steel Rust? When the correct alloy has been chosen for a specific environment, and it still rusts, then something has likely affected the surface of the material. Real-world fabrication, welding and handling of stainless steel components will leave surface contaminants. These contaminates, including weld oxides and embedded particles, hinder stainless steel’s natural ability to resist corrosion. Pickling and/or Passivation can remove these surface contaminants, and allow the material to perform as it is engineered. Common parts and components we passivate include valves, ball valves, tanks, large parts & surfaces, and more.

What is Passivation?

Passivation is the process in which surface contaminants including rust to from stainless steels to allow the material to perform as it is engineered. 

When to Passivate

Because real-world fabrication and handling operations degrade the surface properties of the material, all corrosion-resistant alloys benefit from passivation prior to going into service. Passivation may also be performed on a routine preventative maintenance schedule. Some companies schedule routine passivation once a year while others passivate more frequently as a result of frequent high chloride levels.

Passivation Specifications

Name Description
ASTM A967 Standard Specification for Chemical Passivation Treatments for Stainless Steel Parts
ASTM A380 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems
QQ-P-35C Federal Specification: Passivation Treatments for Corrosion-Resistant Steel (replaced by ASTM A967)
ASTM B912 Standard Specification for Passivation of Stainless Steel Using Electropolishing
ASTM B600 Standard Guide for Descaling and Cleaning Titanium and Titanium Alloy Surfaces
MIL-S-5002 Surface Treatments and Inorganic Coatings for Metal Surfaces of Weapon Systems
SAE AMS 2700E Passivation of Corrosion Resistant Steels

View all Industry Standards.

Passivation Applications

Harrison is a leader in passivation services for the following industries and applications:

Stainless Steel Passivation

Stainless Steel Passivation

Chemical passivation treatment removes free iron & contaminants and promotes the formation of a chromium-rich corrosion resistant layer...

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Passivation & Pickling

Passivation & Pickling

Passivation and Pickling are two different processes, which produce different results...

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AL6XN Passivation

AL6XN Passivation

Harrison Electropolishing has performed passivation treatments on AL6XN with excellent results for a number of years...

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Hastelloy Passivation

Hastelloy Passivation

Surface contaminants, including grease, dirt, iron, and other imbedded metallic particles are removed during the passivation process...

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Nickel Passivation

Nickel Passivation

The presence of exogenous surface contaminants may adversely affect the engineered corrosion-resistant properties of Nickel alloys...

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Passivation Portfolio

Passivation Portfolio

View our portfolio of passivation work.

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