Description:

The copper sulfate test is intended to test the effectiveness of stainless steel passivation. It can also be used to determine if there is a need for passivation.

The purpose of the copper sulfate test is to determine the presence of free iron which is usually induced onto the surface of a part during fabrication with steel components. (Note: parts without surface contaminant iron may pass the test prior to any passivation treatment.) The principle of the test is based on an oxidation-reduction reaction which causes the dissolved copper ions to deposit or plate out onto thefree iron particles.

This test is recommended for the detection of free iron on the surface of austenitic stainless steels in the200 and 300 series, precipitation hardened stainless steels, and ferritic 400 series stainless steels having a minimum of 16 % chromium. This test is not recommended for martensitic 400 series stainless steels with less than 16 % chromium because these steels will give a positive indication irrespective of the presence or absence of anodic surface contaminants. This test is also not recommended for parts with
laser marks.



Physical Properties:

Packaging:
2 oz dropper bottle. Contains sufficient solution for hundreds of tests.

Application Procedure:
The test solution is applied to the surface of the sample representing the lot ofpassivated parts, applying additional solution as needed to keep the surface wet for a period of at least 6 min. At the end of this period, the surface shall be carefully rinsed and dried with care taken not to disturb copper deposits if present. The test sample shall not exhibit copper deposits visible to the naked
eye.

Technical Services:
For technical assistance, please contact Stellar Solutions at (847) 854-2800.

Specifications:
The copper sulfate test meets all of the requirements of ASTM A-967 and AMS 2700 specifications.

No warranty is implied, or may be given in writing or verbally without the written permission of Stellar Solutions, Inc.