Manufacturing capability
Passivation
Passivation is a chemical surface treatment commonly used to improve the corrosion resistance of stainless steel components by removing free iron and certain surface contaminants. It is widely applied to precision machined parts, medical instruments, food-processing equipment, and industrial components requiring clean, corrosion-resistant surfaces.
Related process: Surface Treatment
Manufacturing overview
Stainless steel passivation typically involves controlled chemical treatment to remove surface contamination and support the formation of a protective chromium-rich passive layer.
The process is commonly performed using nitric acid or citric acid-based treatments under defined conditions.
Typical applications include stainless steel fittings, valves, medical instruments, food-processing components, and precision mechanical assemblies.
Common stainless steel grades include 304, 316L, 17-4 PH, and other compatible alloys.
Passivation does not replace proper material selection and cannot compensate for severe surface defects or unsuitable operating conditions.
Surface preparation may involve cleaning, degreasing, and removal of machining residues or embedded iron contamination.
Buyers should specify the stainless steel grade, applicable treatment standard, cleanliness requirements, quantity, and acceptance criteria.
Relevant standards may include ASTM A967/A967M and ASTM A380/A380M, depending on the process and application.
Inspection may include visual examination, free-iron detection, and corrosion-related verification tests.
Metraxio supports passivation RFQs with clearly defined material, treatment, and inspection specifications.