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CitriSurf 2250 is a high quality blend of chemicals formulated for the cleaning and passivation of stainless steel products. CitriSurf 2250 is specifically designed to provide low cost and efficient removal of contaminants and all free iron from the surface of most grades of stainless steel, including austenitic, ferritic, martensitic, precipitation hardening, and duplex, providing the highest chrome oxide levels possible.
CitriSurf is an excellent cleaner by itself for many cleaning and passivation processes. However, to assure best results and help extend the life of the bath, the parts to be passivated may be cleaned with an appropriate cleaning solution prior to treatment with CitriSurf solution, especially when heavy grease and oils are present.All equipment, mixers, tanks and pumps should be clean and dry prior to mixing of CitriSurf solution. 
CitriSurf 2250 should be mixed with clean water (purified water if desired) at a ratio of 1 part of CitriSurf 2250 with 5  parts of water by volume to fill the tank used so as to adequately cover all parts to be treated. 
Polypropylene, stainless steel, or equivalents should be used for construction of all tanks and devices used in the CitriSurf bath. Agitation of the solution in the tank is strongly recommended to attain optimum results.
Heat the solution for optimum performance. 120-160°F is typical. Room temperature is often adequate with increased immersion time. Completely immerse the parts to be passivated in the solution for a period sufficient to remove all free iron and contaminants from the surface. This is typically 5-20 minutes, depending on temperature, grade of stainless steel, hardness, use of ultrasonics, and the condition of the surface of the parts. 
Application Procedure
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