Iimbangela ze-corrosion of stainless steel grating

Iimbangela ze-corrosion of stainless steel grating

1 Ukugcinwa okungafanelekanga, ukuthutha kunye nokunyuswa
Ngexesha lokugcinwa, ukuthutha kunye nokunyuswa, i-grating yensimbi engenasici iya kugqwala xa idibana nemikrwelo evela kwizinto ezinzima, ukudibanisa neentsimbi ezingafaniyo, uthuli, ioli, i-rust kunye nolunye ukungcola. Ukuxuba insimbi engagqwali kunye nezinye izinto kunye nezixhobo ezingafanelekanga zokugcina zinokungcolisa ngokulula umphezulu wensimbi engenasici kwaye kubangele ukubola kweekhemikhali. Ukusetyenziswa ngokungafanelekanga kwezixhobo zothutho kunye nezixhobo kunokubangela amaqhuma kunye nemikrwelo kumphezulu wensimbi engenasici, ngaloo ndlela kutshabalalisa ifilimu ye-chromium yomhlaba yensimbi engenasici kunye nokwenza i-electrochemical corrosion. Ukusetyenziswa ngokungafanelekanga kweehoists kunye neechucks kunye nokusebenza ngendlela engafanelekanga kunokubangela ukuba ifilimu ye-chromium engaphezulu yensimbi engenasici itshatyalaliswe, ibangele ukubola kwe-electrochemical.
2 Ukothula kunye nokwenza izinto ezikrwada
Izixhobo zeplate yentsimbi eqengqelekayo kufuneka zicutshungulwe zibe yintsimbi ecaba ukuze zisetyenziswe ngokuvula nokusika. Kule nkqubo ingentla, ifilimu ye-chromium-rich oxide passivation film ebusweni begridi yensimbi engenasici iyatshatyalaliswa ngenxa yokusikwa, ukudibanisa, ukufudumeza, ukukhutshwa komngundo, ukuqina kokusebenza okubandayo, njl., kubangela ukubola kwe-electrochemical corrosion. Ngaphantsi kweemeko eziqhelekileyo, indawo evezwayo ye-substrate yensimbi emva kokuba ifilimu ye-passivation itshatyalalisiwe iya kusabela kunye ne-atmosphere ukuze izenzele, iphinde ifake ifilimu ye-chromium-rich oxide passivation film, kwaye iqhubeke nokukhusela i-substrate. Nangona kunjalo, ukuba umphezulu wensimbi engenasici awucocekanga, uya kukhawulezisa ukubola kwensimbi engenasici. Ukusika kunye nokufudumeza ngexesha lenkqubo yokusika kunye ne-clamping, ukufudumeza, i-mold extrusion, ukuqina okubandayo okusebenzayo ngexesha lenkqubo yokuqulunqa kuya kubangela utshintsho olungalinganiyo kwisakhiwo kwaye kubangele ukubola kwe-electrochemical corrosion.
3 Ukufaka ubushushu
Ngethuba lenkqubo yokuvelisa i-grating yensimbi engenasici, xa ubushushu bufikelela kwi-500 ~ 800 ℃, i-chromium carbide kwintsimbi engenasici iya kudlula kumda wengqolowa, kwaye i-intergranular corrosion iya kwenzeka kufuphi nomda weenkozo ngenxa yokuncipha komxholo we-chromium. I-thermal conductivity ye-austenitic stainless steel imalunga ne-1/3 ye-carbon steel. Ubushushu obuveliswayo ngexesha le-welding alukwazi ukusasazwa ngokukhawuleza, kwaye ubushushu obukhulu buqokelelwa kwindawo ye-weld ukunyusa izinga lokushisa, okubangela ukubola kwe-intergranular ye-weld yensimbi engenasici kunye neendawo ezikufutshane. Ukongezelela, i-surface oxide layer yonakaliswa, ekulula ukubangela ukubola kwe-electrochemical. Ngoko ke, indawo ye-weld ithanda ukubola. Emva kokuba umsebenzi welding lugqityiwe, ngokuqhelekileyo kuyimfuneko ukupolisha inkangeleko weld ukususa umlotha omnyama, isitshizi, welding slag kunye nezinye eendaba ezithambekele ekudlekeni, kunye pickling kunye nonyango passivation lwenziwa kwi weld evezwa arc.
4. Ukukhethwa okungafanelekanga kwezixhobo kunye nokwenziwa kwenkqubo ngexesha lokuvelisa
Kweyona nkqubo yokusebenza, ukukhetha okungafanelekanga kwezinye izixhobo kunye nokuphunyezwa kwenkqubo nako kunokukhokelela ekudlekeni. Ngokomzekelo, ukususwa okungaphelelanga kwe-passivation ngexesha le-weld passivation kunokubangela ukubola kweekhemikhali. Izixhobo ezingalunganga zikhethwa xa ucoca i-slag kunye ne-spatter emva kwe-welding, okubangelwa ukucocwa okungaphelelanga okanye umonakalo kwizinto zomzali. Ukugaya okungafanelekanga kombala we-oxidation kutshabalalisa i-oxide ye-surface layer okanye ukunamathela kwezinto ezinomhlwa, ezinokukhokelela kwi-electrochemical corrosion.