Kev tiv thaiv corrosion ntawm cov hlau hlau phaj txawv nyob ntawm seb yam xws li hom thiab cov ntsiab lus ntawm cov hlau alloying raws li qhov chaw uas lawv siv.

 

Corrosion Resistance nyob rau hauv txawv ib puag ncig

 

Atmospheric Ib puag ncig: Nyob rau hauv ib puag ncig atmospheric, alloy steel daim hlau muaj kuj zoo corrosion kuj vim yog cov yeeb yaj kiab tiv thaiv tsim ntawm lawv qhov chaw. Piv txwv li, cov hlau hlau hlau uas muaj cov ntsiab lus xws li chromium thiab npib tsib xee tuaj yeem tiv thaiv xeb hauv cov huab cua sib txawv xws li cov chaw hauv nroog, chaw ua haujlwm (muaj cov pa phem xws li sulfur dioxide thiab nitrogen oxides), thiab marine cua (muaj ntsev). Txawm li cas los xij, nyob rau hauv cov cheeb tsam uas muaj kuab paug loj heev uas cov ntsiab lus ntawm acidic gases nyob rau hauv cov huab cua yog siab heev, steel daim hlau uas muaj cov ntsiab lus alloy ntau dua yuav tsum tau ua kom zoo corrosion kuj.

Dej ib puag ncig:

Dej Ntshiab Environment: Alloy steel daim hlau feem ntau muaj corrosion kuj zoo nyob rau hauv cov dej tshiab. Yog tias nws yog cov dej huv huv uas muaj ob peb impurities, xws li cov dej hauv pas dej thiab cov dej ntws, cov hlau nplaum hlau tuaj yeem tiv thaiv corrosion los ntawm cov yeeb yaj kiab tiv thaiv ntawm lawv qhov chaw. Txawm li cas los xij, yog tias cov dej tshiab muaj cov pa oxygen ntau dua, cov kab mob, lossis lwm yam corrosive (xws li cov kua qaub), cov tshuaj tiv thaiv corrosion kuj yuav cuam tshuam rau qee qhov. Piv txwv li, hauv cov kav dej xa dej ntawm qee qhov chaw nres tsheb hauv dej, kev siv cov hlau hlau hlau tuaj yeem tiv taus qhov yaig ntawm cov dej ntws thiab cov corrosion los ntawm cov pa oxygen hauv dej.

Seawater Ib puag ncig: Dej hiav txwv yog ib puag ncig corrosive heev vim nws muaj ntau cov ntsev (tsuas yog sodium chloride), yaj oxygen, thiab kab mob. Txawm li cas los xij, qee qhov tshwj xeeb alloy steel daim hlau (xws li seawater corrosion-resistant alloy steel daim hlau uas muaj cov ntsiab lus xws li chromium, nickel, thiab molybdenum) tuaj yeem ua rau muaj kev tiv thaiv corrosion zoo hauv dej hiav txwv. Piv txwv li, xws li cov hlau alloy hlau yog siv rau hauv cov choj decks thiab cov piers ntawm cov choj hla hiav txwv los tiv thaiv cov dej hiav txwv mus sij hawm ntev thiab ntev kev pab cuam lub neej ntawm cov choj.

 

Chemical Medium Ib puag ncig:

Acid nruab nrab: Nyob rau hauv acidic ib puag ncig, corrosion kuj ntawm alloy steel daim hlau txawv nyob ntawm seb hom, concentrations ntawm acids, thiab alloy compositions. Piv txwv li, nyob rau hauv ib tug dilute sulfuric acid ib puag ncig, alloy steel daim hlau uas muaj cov ntsiab lus xws li npib tsib xee thiab molybdenum tuaj yeem tiv taus cov kua qaub los ntawm kev ua ib zaj duab xis passive. Txawm li cas los xij, nyob rau hauv ib puag ncig hydrochloric acid, cov ntsiab lus siab dua ntawm corrosion-resistant alloy ntsiab (xws li chromium thiab molybdenum) yuav tsum tau txhim kho corrosion kuj. Hauv kev tsim tshuaj lom neeg, cov khoom siv thiab cov kav dej rau khaws cia thiab thauj cov tshuaj acidic tshuaj feem ntau xaiv cov hlau hlau hlau nrog cov kua qaub tiv thaiv.

 

Alkaline nruab nrab: Feem ntau hais lus, alloy steel daim hlau muaj kuj zoo corrosion kuj nyob rau hauv alkaline ib puag ncig. Txawm li cas los xij, yog tias qhov concentration ntawm cov tshuaj alkaline siab dhau los yog nws muaj lwm yam corrosive impurities, nws kuj yuav ua rau corrosion rau cov hlau phaj. Piv txwv li, nyob rau hauv ib co alkaline ua noj ua haus cawv ib puag ncig siv nyob rau hauv daim ntawv kev lag luam, cov corrosion kuj ntawm alloy steel daim hlau yuav ua kom ntseeg tau los ntawm tsim nyog xaiv alloy compositions (xws li cov khoom muaj xws li chromium thiab npib tsib xee).

Av ib puag ncig: Lub corrosiveness ntawm av txawv nyob ntawm seb yam xws li av hom (xws li av acidic, alkaline av, saline av, thiab lwm yam), av noo, thiab huab cua permeability. Lub corrosion kuj ntawm alloy steel daim hlau nyob rau hauv cov av ib puag ncig kuj nyob ntawm lawv cov alloy compositions. Piv txwv li, nyob rau hauv ib co faus pipelines, kev siv cov hlau alloy steel daim hlau uas muaj cov ntsiab lus xws li chromium thiab npib tsib xee tuaj yeem tiv thaiv corrosion los ntawm ya raws, ntsev, thiab cov kab mob hauv cov av, ua kom cov kav dej muaj kev nyab xeeb mus ntev.

 

 

 

 

 

 

 

Nominal Thickness (hli)	Minus sib txawv (mm)	Thickness Deviation ib qhov dav dav (mm)
		> 1000 ~1200	> 1200 ~1500	> 1500 ~1700	> 1700 ~1800	> 1800 ~2000	> 2000 ~2300	> 2300 ~2500	> 2500 ~2600	2600 ~2800	> 2800 ~3000
>12~25	-0.8	+0.2	+0.2	+0.3	+0.4	+0.6	+0.8	+0.8	+1.0	+1.1	+1.2
>25~30	-0.9	+0.2	+0.2	+0.3	+0.4	+0.6	+0.8	+0.9	+1.0	+1.1	+1.2
>30~34	-1.0	+0.2	+0.3	+0.3	+0.4	+0.6	+0.8	+0.9	+1.0	+1.2	+1.3
>34~40	-1.1	+0.3	+0.4	+0.5	+0.6	+0.7	+0.9	+1.0	+1.1	+1.3	+1.4
>40~45	-1.2	+0.4	+0.5	+0.6	+0.7	+0.8	+1.0	+1.1	+1.2	+1.4	+1.5

 

Kev ntsuas los txhim kho Corrosion Resistance

 

Kev kho saum npoo: Dhau li ntawm kev cia siab rau corrosion kuj muab los ntawm alloying ntsiab lawv tus kheej, kev kho deg kuj tuaj yeem nqa tawm ntawm cov hlau hlau hlau los ntxiv txhim kho lawv cov corrosion kuj. Piv txwv li, kev kho mob passivation tuaj yeem ua rau ntawm cov hlau hlau hlau los tsim cov yeeb yaj kiab tiv thaiv denser ntawm lawv qhov chaw los ntawm kev siv tshuaj. Tsis tas li ntawd, kev siv cov txheej txheem (xws li cov txheej txheem organic, cov txheej txheem ceramic, thiab lwm yam) kuj tuaj yeem cais cov hlau daim hlau los ntawm corrosive media. Piv txwv li, siv cov xim pleev xim rau ntawm cov hlau hlau hlau siv rau qee qhov chaw tsheb lossis txheej txheej ceramic rau ntawm qhov chaw ntawm cov hlau hlau phaj siv rau cov khoom siv tshuaj lom neeg tuaj yeem txhim kho lawv cov corrosion kuj zoo.

Tsim nyog tsim thiab tu: Thaum lub sij hawm siv cov hlau hlau alloy, tsim qauv tsim nyog tuaj yeem txo qhov tshwm sim ntawm corrosion. Piv txwv li, tsis txhob muaj cov qauv uas ua rau cov dej tsub zuj zuj thiab qhov khoob uas tuaj yeem ua rau corrosion yooj yim. Lub caij no, kev saib xyuas tsis tu ncua thiab tshuaj xyuas kuj tseem ceeb heev. Rau cov khoom siv hlau hlau phaj siv nyob rau hauv ib puag ncig hnyav, tsis tu ncua tu cov av av, ntsev, thiab lwm yam corrosive tshuaj thiab kho raws sij hawm qhov chaw puas tuaj yeem ua rau lawv lub neej ua haujlwm ntev.

 

 

 

 

Vim li cas thiaj xaiv peb?
Peb txaus siab rau peb lub peev xwm los muab cov kev cai daws teeb meem rau peb cov neeg siv khoom cov kev xav tau tshwj xeeb.
Peb txheeb xyuas thiab sib piv cov khoom dhau los thiab cov xwm txheej tam sim no ntawm peb Marine Choj Fitting RINA Steel Phaj, thiab tsim cov txheej txheem tshiab thiab cov txheej txheem.
Peb cov neeg siv khoom ntseeg peb kom xa cov khoom zoo Cold-rolled Steel khoom raws sijhawm thiab ntawm kev siv nyiaj.
Peb nruj me ntsis siv cov kev pab cuam sov so thiab kev xav tom qab muag, ua raws li kev txhim kho kev ua haujlwm zoo.
Peb muab ntau hom Cold-rolled Steel khoom kom tau raws li cov neeg siv khoom xav tau.
Peb ua raws li cov neeg siv khoom-centric thiab hom-taw qhia kev lag luam lub tswv yim, thiab txuas ntxiv muab cov neeg siv khoom txhim khu kev qha thiab cov khoom zoo thiab cov kev pabcuam.
Peb lub Hoobkas tau cog lus los txhawb nqa cov qauv siab tshaj plaws ntawm kev nyab xeeb thiab zoo.
Txhua tus neeg ua haujlwm ntawm peb lub tuam txhab thiab txhua lub tuam haujlwm ua haujlwm ua ke los ua ke kev tswj hwm kev lag luam, kev tshaj lij thev naus laus zis, kev txheeb cais ntau thiab kev kawm ideological.
Peb cov khoom siv Cold-rolled Steel paub txog lawv cov kav ntev thiab kev ntseeg tau.
Relying ntawm superior tej yam kev mob thiab muaj zog zoo ntawm cov khoom loj, peb muaj peev xwm ua tau raws li qhov sib txawv ntawm peb cov neeg muas zaub.

Cim npe nrov: Tuam Tshoj marine choj haum rina steel phaj, Tuam Tshoj marine choj haum rina steel phaj lwm tus neeg, hoobkas