304 ishubhu yensimbi engagqwali enodonga oluwugqinsiUkuqhathanisa kwe-weld ngaphambi nangemva kokwelashwa kwendawo kanye nokucubungula kubonisa ukuthi: le ndlela ingasusa ukulinganisa nombala wentukuthelo.

Lapho abantu bephakamisa isendlalelo se-304 yensimbi engagqwali ewugqinsi enezindonga ze-oxide yokuqukethwe kwe-chromium oxide, ukwakheka kwesendlalelo se-oxide ngemva kokuthuthukiswa, ungathuthukisa kakhulu ukusebenza kokugqwala kwendawo yeshubhu ewugqinsi enezindonga ezingu-304.Ngezindlela zokwelapha ngamakhemikhali ukuze kuzuzwe 304 insimbi engagqwali obukhulu-izindonga tube ukuthuthukisa ukugqwala ukumelana ebusweni ngezinyathelo ezimbili.Ngisho nensimbi engagqwali engu-304 eshiselwe ishubhu eliwugqinsi ngale ndlela ingase isetshenziselwe ukuthuthukisa ukumelana nokugqwala kwayo.

Uma i-304 insimbi engagqwali enodonga oluqinile ukumelana nokugqwala kunganele, uchwepheshe wokwelapha okungaphezulu kwenkampani yase-Poligrat Munich ithuthukise ubuchwepheshe be-Polinox Protec TC ingakusiza ukuxazulula le nkinga.Lo mshini kanye nabahlinzeki bamakhemikhali bathuthukise ubuchwepheshe bokuthuthukisa i-nickel, i-molybdenum kanye ne-chromium austenitic alloy material, ngaleyo ndlela kuthuthukiswe ukumelana nokugqwala kwe-304 stainless steel stainless-walled tube surface.Ngezinyathelo ezimbili zingandiswa 304 insimbi engagqwali obukhulu-ngodonga tube surface oxide ungqimba ukumelana ukugqwala.

Isinyathelo sokuqala ekusetshenzisweni kwesisombululo se-organic esisekelwe emanzini se-304 stainless steel stainless-walled tube surface silashwa phezulu.Lokhu kwelashwa okungaphezulu kuzohlala 3 ~ 5h.Ngalesi sikhathi, susa ungqimba lwe-oxide ebusweni bengxenye yensimbi, ngokuncishiswa kwensimbi, i-chromium ne-iron ratio yanda isuka ku-6% iye ku-8%, ibe nendima esebenzayo ekuthuthukiseni ukumelana nokugqwala.

Isinyathelo sesibili sokuthuthukisa ukwakheka kongqimba lwe-oxide engaphezulu.Lokhu kuthuthukisa ngokwengeziwe ukumelana nokugqwala kongqimba lwe-oxide engaphezulu.Ukuthinta ukwakheka kongqimba lwe-oxide engaphezulu kuyisinyathelo sokwelashwa kokushisa: ngokuya ngohlobo lwengxubevange nokwelashwa kokushisa kwe-crystal lattice yento esemoyeni ku-140.℃~ 200℃phakathi.