Intambo eyisithakoekusetshenzisweni kwesikhathi esithile, ingaphezulu le-galvanized layer lizoxebuka, liwe, ngakho-ke lithinta ubuhle bocingo oluvunyiwe, kuphela ukuvumela ubuso bongqimba obunama-galvanized bususwe, ngemva kokupholishwa, ukuphinda kuhlanganiswe, ukuze kuqinisekiswe ukuthi izintambo zikathayela zisetshenziswa isikhathi eside.
Okokuqala, isidingo sodium hydroxide 200 ~ 300g/L sodium nitrite 100 ~ 200g/L amanzi ukwengeza 1L ukuze ungakwazi ukususa izingxenye ngenkani kakhulu futhi ucingo lwensimbi nokunye.Izinga lokushisa lokwelapha liyi-100 ℃, futhi isikhathi kuze kube ukuhlanzwa.
Ukuvikelwa kwe-zinc enamathela ku-matrix yensimbi kunezimiso ezimbili: ngakolunye uhlangothi, nakuba i-zinc isebenza kakhulu futhi kulula ukuyikhipha kune-iron, kodwa ifilimu yayo ye-oxide ayikhululekile futhi ihlangene njenge-iron oxide.Ungqimba oluminyene lwe-oxide olwakhiwe phezulu luvimbela ukuqhubekela phambili kwe-oxidation ye-zinc ngaphakathi.Ikakhulukazi emva passivation ofokufakwe uthayelaungqimba, ubuso bongqimba lwe-oxide bukhulu kakhulu futhi buminyene, ngokwayo inokuvimbela okuphezulu kwe-oxidation.
Ngakolunye uhlangothi, lapho ebusweni theokufakwe uthayelaungqimba lonakalisiwe, ukuveza i-matrix yensimbi yangaphakathi, ngoba i-zinc isebenza kakhulu kune-iron, ngalesi sikhathi, i-zinc ithwala indima yokunikela nge-zinc anode, i-zinc izokwenziwa oxidized ngaphambi kwensimbi, ukuze uvikele ungqimba lwensimbi ngeke lonakaliswe.
Isikhathi sokuthumela: 18-03-22