Istech Metal Finish Bv

a clean and passive surface finish is crucial to corrosion resistance. stainless steel is protected from corrosion by its passive layer – a thin, impervious, invisible, surface layer that is primarily chromium oxide. the oxygen content of the atmosphere or of aerated aqueous solutions is normally sufficient to create and maintain (“self-heal”) this passive layer. unfortunately, surface defects and imperfections introduced during manufacturing /construction may drastically disturb this “self-healing” process and reduce resistance to several types of local corrosion. thus, as regards hygiene and corrosion, a final cleaning process is required to restore an acceptable surface quality. corrosion and protection of stainless steel: stainless is obtained by a certain chromium content (from 12%). the corrosion protection is formed by the extremely thin and translucent, but fully closed oxide film, developed by the air. the oxide film or passivation layer, which causes the corrosion resistance,