Passivation Test

The process of corrosion and rust protection (Passivation) is a critical chemical treatment applied to stainless steel surfaces after welding. Its main purpose is to restore and strengthen the protective chromium oxide layer, which acts as an effective barrier against corrosion, ensuring long-term durability of the piping while maintaining the highest purity standards across the distribution system.

In high-purity water systems such as WFI and PW, a Passivation test is carried out to verify full surface protection and compliance with stringent pharmaceutical quality requirements. The procedure typically involves treatment with a mild acid to remove surface iron residues, followed by controlled rinsing and thorough inspection of the piping system.

Key Benefits:

• Improved corrosion resistance, particularly at weld joints.

• Full compliance with pharmaceutical standards such as ASME BPE.

• Preservation of water purity by eliminating the risk of metallic contamination.

• Assurance of a smooth, high-quality internal surface throughout the entire system.