Yuav ua li cas txheeb xyuas cov khoom ntawm stainless hlau xaim?

Cov hlau tsis muaj hlaumuaj nyob txhua qhov chaw hauv peb lub neej, xws li cov pob tawb cwj mem, lub tawb nqa khoom, cov hlua khi ntawm cov poj niam nyiam lub hnab, hluav taws xob kiv cua tiv thaiv npog, rub rov qab xov hlau rau lub kaus, khaub ncaws hangers, barbecue grills, barbecue diav rawg, thiab lwm yam. Nws yog ua los ntawm stainless hlau hlau. nrog cov kev qhia tshwj xeeb sib txawv, yog li ntawm no peb yuav piav qhia koj yuav ua li cas paub qhov txawv ntawm cov khoom siv ntawm cov hlau tsis muaj hlau, yog li koj tuaj yeem xaiv cov hlau tsis muaj hlau zoo dua uas haum rau koj.
1. Magnetic test method
Austenitic stainless hlau yog cov hlau tsis muaj hlau nplaum, tab sis nws yuav muaj cov hlau nplaum me me tom qab txias ua haujlwm hauv siab; thiab ntshiab chromium hlau thiab ferritic stainless hlau. Cov hlau tsis tshua muaj hlau yog cov hlau nplaum muaj zog.
2. Nitric acid point test method
Ib qho tshwj xeeb ntawm cov hlau tsis muaj steel hlau yog nws qhov kev tiv thaiv corrosion rau cov concentrated thiab dilute nitric acid, uas tso cai rau nws kom yooj yim sib txawv ntawm lwm yam hlau los yog alloys.
3. Copper sulfate point test method
Copper sulfate point test yog ib txoj hauv kev yooj yim kom paub qhov txawv ntawm cov pa roj carbon zoo tib yam thiab txhua hom stainless hlau xaim. Qhov concentration ntawm tooj liab sulfate tov yog 5 feem pua ​​-10 feem pua. Ua ntej qhov ntsuas qhov ntsuas, qhov chaw xeem yuav tsum tau muab tshem tawm tag nrho ntawm cov roj los yog Tshem tawm lwm cov impurities, thiab siv cov khoom siv los yog cov ntaub mos mos los txhuam cov cheeb tsam me me, thiab tom qab ntawd tso cov tshuaj ntsuam xyuas mus rau qhov chaw polished. Ordinary carbon steel los yog hlau yuav tsim ib txheej ntawm nto hlau tooj liab nyob rau hauv ob peb lub vib nas this, thaum lub sij hawm qhov chaw kuaj qhov saum npoo ntawm stainless hlau ces tsis muaj tooj liab los nag los yog cov xim ntawm tooj liab tshwm.
4. Txoj kev kuaj sulfuric acid
Qhov txiav ntug ntawm cov qauv yuav tsum tau ua kom zoo, thiab tom qab ntawd ntxuav thiab passivated nyob rau hauv sulfuric acid nrog ib tug ntim concentration ntawm 20% ~ 30 feem pua ​​thiab kub ntawm 60 ~ 66 degree rau ib nrab ib teev. Lub ntim concentration ntawm sulfuric acid tov yog 10 feem pua, thiab rhuab mus rau 71 degree. Thaum 302 thiab 304 tau muab tso rau hauv qhov kev daws teeb meem, cov hlau tau corroded sai heev thiab tsim cov npuas ntau, thiab cov qauv tig dub li ntawm ob peb feeb; thaum cov qauv ntawm 316 thiab 317 steel tsis corroded los yog corroded qeeb heev (tsis muaj npuas tsim), Qhov kev ntsuam xyuas tsis hloov xim li ntawm 10-15 feeb. Qhov kev ntsuam xyuas tuaj yeem ua kom raug ntau dua yog tias qhov kev sib piv kwv yees tau tsim los ntawm kev siv cov qauv uas paub muaj pes tsawg leeg thaum kuaj.