Insimbi engagqwaliiyingxube yensimbi ekwazi ukumelana nokugqwala nokugqwala.Iqukethe okungenani i-chromium engu-11%.Insimbi engagqwali ukumelana nokugqwala kuvela ku-chromium, eyenza ifilimu ye-passive evikela into futhi izilungise lapho kukhona umoya-mpilo.
Ukuhlanzeka kwayo, amandla kanye nokumelana nokugqwala kuholele ekusetshenzisweni kwensimbi engagqwali ezindaweni ezikhiqiza imithi nokudla.
Izinhlobo ezahlukene zensimbi engagqwali zimakwe ngezinombolo ze-AISI ezinamadijithi amathathu, futhi izinga le-ISO 15510 libala ukwakheka kwamakhemikhali ezinsimbi ezingenasici ezicaciswe kumazinga akhona e-ISO, ASTM, EN, JIS kanye ne-GB kuthebula lokushintshana eliwusizo.