Passivation Treatment Process

This video takes you inside the distribution piping of a typical water system to see the Cleaning, Derouging, and Passivation treatment process. This video will demonstrate the treatment process of a typical system and show how passivation can improve the corrosion resistance.

Passivation Treatment Process

Rouge Formation –
• Rouge crystals form on surface of metal
• Particles of rouge breakaway and migrate into the system

Astro Pak Pump Skid –
• Custom designed pump skids are used to mix and circulate chemistry through the system

Step 1: Cleaning –
Removes organics from metal’s surface

Step 2: Derouging
Removes rouge/metal oxides from metal’s surface

Step 3: Passivation –
• Use chelants to remove free iron from the metal’s surface rendering it nonreactive and yields an optimal passive layer

Passivation is a treatment and cleaning process used to remove iron from the surface of corrosion resistant steel parts. Chemical passivation forms a more uniform passive layer, which increases the Chromium to Iron Ratio, thus enhancing the corrosion resistance of the metal’s surface.

To learn more about the passivation process and Astro Pak, visit our other related pages.

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Mike Montgomery

Since 2012 Mike has served as the Technical Director of Electropolishing at Astro Pak Corporation. With over thirty years of mechanical, machining, and metal finishing experience, Mike brings practical knowledge, capability and excellence to vessel restoration projects across the country. Mike develops and implements training programs, including confined space entry, ensuring technical excellence and safety amongst all Astro Pak MP/EP Technicians.

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