Introduction 303 free cutting steel environmental passivation solution by our hand in Huazhong University of Science jointly developed with, this product is a combination of inorganic and organic compound from the SUS303 stainless steel surface in contact with the passivation solution soak in the stainless steel surface micro-chemical reaction, prompting the metal surface to form a complete continuous passive film, the original chemically active metal surface into a chemically inert nature of the metal surface, to a chemical reaction with the outside world cut off material to achieve the effect of long-term rust, wherein the inorganic component is generated induced passivation film, organic components strengthen complete passivation film, the two synergistically increased anticorrosive ability SUS303 stainless steel surface. ? Features and Benefits Simple: colorless, transparent solution, easy to use, reusable and efficient Pharmacy:? Passivation process shorter 40S fast film, excellent anti-corrosion effect, neutral salt spray test more than 72 hours in environmental protection:? Absolutely not containing heavy metals and other harmful substances, safety and environmental protection, pH value near neutral, biodegradable Applications? applicable to all types of SUS303 (including SUS303Cu) passivation of stainless steel cutting