ISO 3651-2 Determination of the Resistance of Stainless Steels to Intergranular Corrosion - Ferritic, Austenitic and Ferritic-Austenitic (Duplex) Stainless Steels - Corrosion Test in Environments Containing Sulfuric Acid

EUROLAB laboratory provides testing and compliance services within the scope of ISO 3651-2 standard. This part of ISO 3651 specifies methods for determining the resistance of ferritic, austenitic and ferritic-austenitic stainless steels to intergranular corrosion in environments containing sulfuric acid. It also specifies the purposes that can be assigned to the test.

Included test methods are:

• Method A: 16% sulfuric acid/copper sulfate test;
• Method B: 35% sulfuric acid/copper sulfate test;
• Method C: 40% sulfuric acid/ferric sulfate test.

The methods are applicable to stainless steels supplied as cast, rolled or forged products and pipes and intended for use in a mildly oxidizing acid environment.

Unless specified in the product standard, the method A, B or C to be used will be the subject of an agreement between the parties concerned.

It is important to note that the result of the corrosion test is strictly valid only for the corrosive medium used in the test. It provides a basis for estimating resistance to intergranular corrosion but cannot be used to control resistance to other forms of corrosion. The user must adapt the specified corrosion test to the use to be made of the alloy. In no case should these tests be considered an absolute criterion of the quality of the metal.

EUROLAB assists manufacturers with ISO 3651-2 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.