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The CitriSurf® citric acid cleaning and passivation process is based on a new technology using safe and environmentally friendly citric acid to remove the free iron from the surface of stainless steel and chromium enrich the surface.
Austenitic stainless steel surfaces can be made highly resistant to corrosion if it is properly cleaned and passivated prior to use. Organic acids have been found to be much more effective than the traditional toxic mineral acids such as nitric acid. In addition, citric acid does not pose the environmental hazards that are present with nitric and other mineral acids.
Even with austenitic stainless steel, such as the 300 series, once a corrosion site has started it only gets worse, being continuous and self-catalyzing. In corrosive environments the growth of the corrosion site will accelerate rapidly! Thus, proper cleaning and passivation of surfaces prior to use is essential to achieve maximum resistance to corrosion.
CitriSurf® solutions provide the maximum protection by providing:
CitriSurf 2310 is a high quality blend of chemicals formulated for cleaning, rust removal and passivation of stainless steel products. It is provided in a high viscosity form for easy application on weld joints, vertical surfaces, and other large items or areas that cannot be conveniently dipped in a bath. CitriSurf 2310 is specifically designed to provide low cost and efficient removal of all rust and free iron from the surface of stainless steel and other metals, providing the highest chrome oxide levels possible.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
CitriSurf 2325 is a high quality blend of chemicals formulated for cleaning, rust removal and passivation of stainless steel products. CitriSurf 2325 is specifically designed to provide low cost and efficient removal of contaminants and all rust and free iron from the surface of stainless steel, providing the highest chrome oxide levels possible.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
CitriSurf 77 Plus is a high quality blend of chemicals formulated for cleaning, rust removal and passivation of stainless steel products. It is provided in trigger sprayer bottles for applications where it is desired to spray the product on a local area. CitriSurf 77 Plus is specifically designed to provide a portable, low cost and efficient removal of contaminants and all rust and free iron from the surface of stainless steel, providing the highest chrome oxide levels possible.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
CitriSurf 8050 is a high quality blend of chemicals formulated for the derouging, descaling, and passivation of stainless steel products. CitriSurf 8050 is specifically designed to provide low cost and efficient removal of all iron oxides and free iron from the surface of stainless steel, providing the highest chrome oxide levels possible.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
CitriSurf 8310 is a high quality blend of chemicals formulated for severe rust removal, descaling, and passivation of stainless steel products. It is provided in a high viscosity form for easy application on weld joints, vertical surfaces, and other large items or areas that cannot be conveniently dipped in a bath. CitriSurf 8310 is specifically designed to provide low cost and efficient removal of all rust and free iron from the surface of stainless steel and other metals, providing the highest chrome oxide levels possible.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
CitriSurf 9002 is a high quality blend of chemicals formulated for cleaning, brightening and stripping metals. It can also be used as the electrolyte for electro-chemical removal of scale and weld discoloration. It is provided in a powder form to yield high activity at the lowest possible cost.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
Rust Rescue 200 is a high quality blend of chemicals formulated for the protection of stainless steel and other metal surfaces from moisture and harsh atmospheric chemicals that could lead to corrosion.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA
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 the free iron particles. This test is recommended for the detection of free iron on the surface of austenitic stainless steels in the 200 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 ontaminants. This test is also not recommended for parts with laser marks.
CitriSurf is a registered trademark of Stellar Solutions, Inc., McHenry, IL USA