I-Corten steel iyinsimbi ye-alloy. Ngemuva kweminyaka eminingana yokuchayeka ngaphandle, ungqimba lokugqwala oluminyene kakhulu lungakhiwa phezulu, ngakho-ke aludingi ukupendwa ukuze luvikeleke. Igama elaziwa kakhulu lensimbi yesimo sezulu yi-"cor-ten", okuyisifinyezo se-"corrosion resistance" kanye "nokuqina kwamandla", ngakho-ke ngokuvamile ibizwa ngokuthi "Corten steel" ngesiNgisi. Ngokungafani nensimbi engagqwali, engakwazi ukugqwala ngokuphelele, insimbi yesimo sezulu i-oxidize kuphela ebusweni futhi ingangeni ngaphakathi, ngakho-ke inezindawo eziphakeme zokulwa nokugqwala.
Insimbi ye-Corten ibhekwa “njengento ephilayo” ngenxa yenqubo yayo yokuvuthwa okungajwayelekile/yokwenza i-oxidation. Umthunzi kanye nethoni kuzoshintsha ngokuhamba kwesikhathi, kuye ngesimo sento, lapho ifakwe khona, kanye nomjikelezo wesimo sezulu umkhiqizo odlula kuwo. Isikhathi esizinzile ukusuka ekufakweni kwe-oxid kuya ekuvuthweni ngokuvamile siyizinyanga eziyi-12-18. Umthelela wokugqwala wendawo awungeni ezintweni, ukuze insimbi ngokwemvelo yakhe isendlalelo esivikelayo ukuze igweme ukugqwala.
Corten steel ngeke ukugqwala. Ngenxa yokwakheka kwamakhemikhali, ikhombisa ukumelana okuphezulu nokugqwala komkhathi kunensimbi ethambile. Ubuso bensimbi buzogqwala, bube ungqimba oluvikelayo esilubiza ngokuthi "i-patina."
Umthelela wokuvimbela ukugqwala we-verdigris ukhiqizwa ukusatshalaliswa okukhethekile kanye nokugxila kwezinto zayo ze-alloying. Lesi sendlalelo esivikelayo siyagcinwa njengoba i-patina iqhubeka nokukhula futhi ivuselela lapho ibhekene nesimo sezulu. Ngakho ingasetshenziswa isikhathi eside ngaphandle kokulimala kalula.