Tsis yog tag nrho cov hlau tsis muaj steel tuav corrosion sib npaug. Hauv kev ua tshuaj lom neeg, kev tsim khoom noj khoom haus, thiab ib puag ncig marine, cartridge rhaub sheaths ntsib cov xwm txheej hnyav uas cov khoom siv tsis tuaj yeem muaj sia nyob.
Cov 304 stainless hlau siv dav dav - lub hom phiaj cua sov muaj kaum yim feem pua chromium thiab yim feem pua nickel. Cov tshuaj no tiv taus oxidation thiab me me corrosive nres. Tab sis raug cov tshuaj chlorides, sulfur compounds, los yog muaj zog acids ua rau pitting sai thiab kev nyuaj siab corrosion cracking.
316 stainless hlau ntxiv ob mus rau peb feem pua molybdenum. Cov khoom no ua rau cov tshuaj chloride tsis kam. Kev siv dej hiav txwv, cov khoom siv tshuaj dawb, thiab cov chaw tsim khoom hauv ntug dej hiav txwv xav tau qhov kev hloov kho tshiab no. Cov khoom raug nqi kwv yees li nees nkaum- tsib feem pua ntau dua tab sis kav ntev li tsib mus rau kaum zaug hauv cov xwm txheej hnyav.
Rau ib puag ncig tshuaj lom neeg, Inconel 600 thiab 800 alloys muab kev ua tau zoo dua. Cov nickel -chromium- hlau alloys tuav lub zog thiab corrosion kuj dhau ib txhiab degrees Celsius. Sulfuric acid ua, siab -kub ntsev da dej, thiab qee yam kev siv petrochemical xav tau kev tiv thaiv qib no.
Incology 800 tshwj xeeb tiv thaiv carburization thiab nitriding- hom kev ua tsis tiav uas ua rau cov qauv stainless hlau nyob hauv cov cua sov kho cua sov. Cov ntawv thov rauv nrog cov pa roj carbon monoxide lossis nitrogen cov cua sov xav tau qhov kev qhia tshwj xeeb no.
Ceramic coatings muab lwm txheej tiv thaiv. Aluminium oxide los yog silicon carbide coatings siv tshaj cov hlau sheaths tsim teeb meem tiv thaiv tshuaj tua kab mob thaum tswj thermal conductivity. Cov no ntxiv cov nqi ua haujlwm tab sis ua kom siv lub tshuab cua sov hauv ib puag ncig uas yuav rhuav tshem cov hlau tsis muaj kev tiv thaiv hauv lub lis piam.
Kev xaiv cov khoom yuav tsum xav txog qhov kub thiab txias, tsis yog chemistry xwb. Qee qhov corrosion-cov alloys tiv taus poob txhua lub zog ntawm qhov kub siab. Cov khoom zoo meej rau chav -kub acid kuj yuav sag los yog creep ntawm kev khiav hauj lwm kub, ua rau cua sov deformation thiab tsis ua hauj lwm ntxov ntxov.
Ua -hauv cov thermocouples pab kom muaj kev xaiv cov khoom siv. Los ntawm kev saib xyuas qhov ntsuas kub ntawm qhov ntsuas kub piv rau qhov kub thiab txias, cov kws ua haujlwm paub tseeb tias qhov kev xav ntawm thermal tsim yog qhov tseeb. Qhov ntsuas kub tsis xav txog tej zaum yuav qhia tau tias cov ntaub qhwv tsis ua haujlwm raws li qhov xav tau, lossis cov yam ntxwv hloov pauv tau hloov pauv vim muaj cov kab mob sib kis lossis cov tshuaj tiv thaiv txheej txheej.
Rau cov ntawv thov tshiab, cov txheej txheem kev sim yuav tsum suav nrog kev ntsuas kev ntsuas corrosion nrawm. Cov cua sov ua piv txwv raug rau cov txheej txheem nrog kev ntsuas kub tsis tu ncua qhia cov teeb meem kev sib raug zoo ua ntej tag nrho - nplai xa tawm. Txoj kev no tiv thaiv cov nqi rov qab thiab kev cuam tshuam ntau lawm.
