Common surface treatment methods for stainless steel hinges
Commonly used stainless steel hinge surface treatment technology has the following treatment methods: surface whitening treatment; surface mirror bright treatment; surface coloring treatment.
Surface whitening treatment: During the processing of the stainless steel hinge, it is rolled, edged, welded or heated by artificial surface fire to produce black oxide skin. This hard gray-black oxide scale is mainly composed of two EO4 components, NiCr2O4 and NiF. In the past, hydrofluoric acid and nitric acid were generally used for strong corrosion removal. However, this method has high cost, pollutes the environment, is harmful to human body, and is highly corrosive, and is gradually eliminated.
Mirror bright treatment method on the surface of stainless steel hinge: According to the complexity of stainless steel products and user requirements, mechanical polishing, chemical polishing, electrochemical polishing and other methods can be used to achieve mirror gloss.