Passivation Chemicals: Medipass, Aeropass, and the CitriSurf Series

CitriSurf: High-Performance Citric Acid Passivation

CitriSurf is a high-performance citric acid passivation solution designed for stainless steel, providing superior corrosion resistance without the hazards associated with nitric acid. As a safer and more environmentally friendly alternative, CitriSurf effectively removes free iron while preserving the integrity of the stainless steel surface, ensuring compliance with industry standards such as ASTM A967 and AMS 2700.

Developed for versatility, CitriSurf is available in multiple formulations to suit different stainless steel grades and passivation methods. CitriSurf 2050 is a cost-effective solution ideal for 300-series stainless steel, while CitriSurf 2250 is commonly used for 400-series stainless steels, offering a higher pH to protect sensitive surfaces. Low-foaming versions such as CitriSurf 3050 and 3250 are available for spray applications, and CitriSurf 2450 is designed for extremely low-chromium stainless steel. For large or on-site applications, CitriSurf 77 provides a sprayable liquid formula, while CitriSurf 2210 is a thick gel designed for localized treatment, such as post-laser marking passivation.

CitriSurf is widely used across industries, including aerospace, medical, food and beverage, and pharmaceutical manufacturing, ensuring stainless steel components meet the highest standards of cleanliness and durability. Whether for immersion, spray, or manual application, CitriSurf delivers a reliable, non-toxic passivation process tailored to various industrial needs.