Stainless Steel Passivation & Derouging
Stainless steel is expensive! To ensure that you get the highest return on your investment, a thorough cleaning and passivation before commissioning is essential. Passivation is defined as the removal of free iron from the surface and the formation of a stable chromium-oxide layer. You may be surprised to know that stainless steel is auto-passivating. This means that a passive film will form on its own. However, free iron, chlorides, grease, oil, and other contaminants will prevent a uniform, robust passive layer from forming. Treating the surface with the proper chemical solutions will remove all contaminants and set up the very best environment for the formation of the passive layer.
Stainless Steel Passivation & Derouging Capabilities
- All stainless steel equipment can benefit from an initial passivation before being placed in service. We typically passivate piping, equipment, and tanks for food and pharmaceutical producers. Existing systems require passivation when modifications are made and high purity water systems may develop rouge over time that will require derouging.
- Passivation is a time tested and proven method of increasing the corrosion resistance of your equipment. By removing free iron and promoting the formation of a chromium oxide layer, passivation is cheap insurance for your expensive equipment.
- Industry Standards/Specifications
- ASTM A-967 and A-380, QQ-P-35, and customer specifications
- Equipment Used
- We utilize mobile pumps, heat exchangers, valves, and tanks that are designed to handle the temperatures and chemicals used during passivation. We also stock a large variety of hoses and fittings that make connecting to your equipment fast and easy. Concord can provide a complete turnkey solution for your project OR utilize your CIP systems for economy. One of the most important steps in passivation is the final rinse. We can provide a reverse osmosis skid that produces 7.5 gpm of high purity water for rinsing. In addition, we have electronic meters for measuring pH, temperature, and conductivity that gather the reliable data necessary for a final report and log sheet.