Tread tiv thaiv corrosion. Txoj hauv kev tseem ceeb los tiv thaiv cov kav dej los ntawm corrosion

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Txhua yam khoom hlau tau yooj yim puas tsuaj los ntawm qee yam sab nraud, feem ntau cov av noo. Txhawm rau tiv thaiv cov xwm txheej zoo li no, siv kev tiv thaiv corrosion sacrificial. Nws txoj haujlwm yog los txo cov peev txheej ntawm cov khoom siv hauv paus thiab yog li tiv thaiv nws los ntawm corrosion.

Lub ntsiab ntawm cov txheej txheem

Kev tiv thaiv kev tiv thaiv yog ua raws li cov khoom siv xws li inhibitor. Nws yog cov hlau uas muaj cov khoom zoo electronegative. Thaum raug huab cua, lub tread dissolves. Yog li ntawd, cov khoom siv hauv paus yog khaws cia txawm tias nws raug cuam tshuam los ntawm corrosion.

Ntau hom kev xeb tau yooj yim swb siv cov txheej txheem cathodic electrochemical, uas suav nrog kev tiv thaiv cathodic. Cov txheej txheem zoo li no yog qhov kev daws teeb meem zoo tshaj plaws thaum lub tuam txhab tsis muaj peev nyiaj txiag lossis thev naus laus zis los muab kev tiv thaiv tag nrho tiv thaiv cov txheej txheem corrosive.

Key Benefits

Tiv thaiv cov hlau tiv thaiv corrosion yog ib txoj hauv kev zoo los tiv thaiv txhua qhov chaw hlau. Nws muaj txiaj ntsig hauv ntau qhov xwm txheej:

1. Thaum lub lag luam tsis muaj peev xwm siv zog siv zog ntau dua.
2. Thaum cov qauv me me yuav tsum tau tiv thaiv.
3. Thaum tiv thaiv cov khoom siv hlau thiab cov khoom uas nws qhov chaw yuav tsum tau them nrog cov ntaub ntawv insulating.

Kom ua tiav qhov ua tau zoo tshaj plaws, nws raug nquahu kom siv kev tiv thaiv kev txi rau hauv ib puag ncig electrolytic.

Thaum twg yuav tsum muaj kev tiv thaiv?

Corrosion tshwm sim ntawm txhua qhov chaw hlau hauv ntau thaj chaw - los ntawm kev lag luam roj thiab roj mus rau kev tsim nkoj. Kev tiv thaiv corrosion yog dav siv nyob rau hauv painting ntawm tanker hulls. Cov nkoj no tau raug dej tas li, thiab cov xim tshwj xeeb tsis tas yuav ua txoj haujlwm ntawm kev tiv thaiv cov dej los ntawm kev cuam tshuam nrog cov hlau nto. Kev siv cov khoom tiv thaiv yog ib qho yooj yim thiab muaj txiaj ntsig zoo rau cov teeb meem, tshwj xeeb tshaj yog tias cov nkoj yuav ua haujlwm ntev.

Feem ntau cov qauv hlau yog tsim los ntawm cov hlau, yog li nws raug nquahu kom siv cov khoom tiv thaiv nrog lub peev xwm tsis zoo electrode. Peb cov hlau yog cov tseem ceeb rau kev tsim cov khoom tiv thaiv - zinc, magnesium, aluminium. Vim muaj qhov sib txawv loj ntawm cov hlau thiab hlau, lub vojvoog ntawm kev tiv thaiv kev ua haujlwm tau dav dua, thiab txhua yam kev xeb tau yooj yim tshem tawm.

Yuav siv cov hlau dab tsi?

kev tiv thaivNws yog tsim los ntawm ntau yam alloys, nyob ntawm qhov tshwj xeeb ntawm kev siv cov khoom tiv thaiv, piv txwv li, ib puag ncig uas nws yuav siv. Kev tiv thaiv corrosion feem ntau xav tau rau cov khoom siv hlau thiab hlau, tab sis zinc, aluminium, cadmium lossis magnesium nto kuj xav tau nws. Ib qho tshwj xeeb ntawm kev tiv thaiv tread yog siv cov galvanic anodes, uas tiv thaiv cov kav dej los ntawm cov av corrosion. Kev suav ntawm cov kev teeb tsa no tau ua tiav los ntawm tus lej ntawm qhov tsis muaj:

• tam sim no hauv tus tiv thaiv;
• ntsuas ntawm nws qhov kev tawm tsam;
• degree ntawm kev tiv thaiv xav tau rau 1 km ntawm cov yeeb nkab;
• ntau tus tiv thaiv rau tib ntu;
• qhov kev ncua deb uas muaj nyob nruab nrab ntawm cov ntsiab lus ntawm kev tiv thaiv.

Qhov zoo thiab qhov tsis zoo ntawm cov tiv thaiv sib txawv

Rau lub hauv paus ntawm kev tiv thaiv, kev tiv thaiv lub tsev tiv thaiv corrosion, cov kav dej ntawm ntau hom (kev faib tawm, lub ntsiab, teb) yog tsim. Tib lub sijhawm, koj yuav tsum siv lawv kom zoo:

• siv cov khoom tiv thaiv txhuas yog tsim nyog txhawm rau tiv thaiv cov qauv thiab cov qauv hauv dej hiav txwv thiab ntug dej hiav txwv;
• Magnesium yog haum rau siv nyob rau hauv ib tug me ntsis hluav taws xob conductive ib puag ncig uas txhuas thiab zinc tiv thaiv qhia tsis zoo. Tab sis lawv tsis tuaj yeem siv yog tias nws yuav tsum tau tiv thaiv sab hauv ntawm cov tankers, tso tsheb hlau luam, cov roj av, vim tias cov tshuaj tiv thaiv magnesium yog tus cwj pwm los ntawm kev tawg thiab hluav taws kub. Qhov zoo tshaj plaws, projectorsLub hauv paus ntawm cov khoom no yuav tsum tau siv rau kev tiv thaiv sab nraud ntawm cov qauv uas siv rau hauv ib puag ncig tshiab;
• zinc tiv thaiv muaj kev nyab xeeb tag nrho, yog li lawv tuaj yeem siv rau txhua yam khoom, txawm tias lawv muaj qhov phom sij txaus ntshai.

Yog cov txheej yog xim pleev xim

Ntau zaus nws yuav tsum tau tiv thaiv cov roj lossis cov kav dej los ntawm kev xeb, suav nrog kev pleev xim. Kev sib xyaw ua ke nrog tus tiv thaiv yog ib txoj hauv kev tiv thaiv cov qauv ntawm corrosion. Nyob rau tib lub sijhawm, qhov ua tau zoo ntawm qhov kev tshwm sim tsis yog siab heev, tab sis cov hauv qab no tau ua tiav:

• qhov tsis xws luag yog qib ntawm cov txheej txheem hlau, cov kav dej, piv txwv li, tev, tawg;
• kev noj cov khoom siv tread raug txo qis, thaum kev tiv thaiv nws tus kheej ntau dua;
• tiv thaiv tam sim no sib npaug ntawm cov hlau ntawm cov khoom lossis cov khoom.

Kev tiv thaiv corrosion ua ke nrog cov xim pleev xim - qhov no yog lub peev xwm los faib cov kev tiv thaiv tam sim no rau ntawm cov chaw uas xav tau kev saib xyuas ntau tshaj.

Kev Tiv Thaiv Pipeline

Raws li cov kav hlau siv, lawv corrode sab hauv thiab tawm. Plaque tshwm sim vim qhov tseeb tias cov khoom hnyav ntws los ntawm cov kav dej, uas cuam tshuam nrog cov ntaub ntawv. Lub xeev sab hauv ntawm cov khoom hlau yog cuam tshuam los ntawm qib siabav noo. Yog tias kev tiv thaiv zoo ntawm lub tsev tsim tawm tsis tau xav txog, cov hauv qab no yuav tshwm sim:

• lub raj xa dej yuav pib tawg los ntawm sab hauv;
• yuav tsum tau tshuaj xyuas kev tiv thaiv ntau zaus ntawm txoj kev loj;
• yuav tsum tau kho ntau zaus, uas yuav cuam tshuam cov nuj nqis ntxiv;
• nws yuav tsim nyog los ua kom tiav lossis ib nrab kaw cov roj refinery lossis lwm qhov chaw ua haujlwm.

Muaj ntau txoj hauv kev los tiv thaiv cov kav dej - passive, nquag. Tsis tas li ntawd, txo qis kev ua phem ntawm ib puag ncig tuaj yeem ua raws li kev tiv thaiv. Txhawm rau tiv thaiv kom paub meej, hom raj xa dej, cov txheej txheem ntawm nws qhov kev teeb tsa thiab kev cuam tshuam nrog ib puag ncig raug coj mus rau hauv tus account.

Txoj kev tiv thaiv Passive thiab nquag

Txhua txoj hauv kev tseem ceeb los tiv thaiv cov kav xa dej los ntawm kev xeb los ua haujlwm ntau. Yog hais tias peb tham txog passive txoj kev, lawv qhia raws li nram no:

• txoj kev tshwj xeeb ntawm kev tso, thaum kev tiv thaiv corrosion yog xav tawm txawm nyob rau theem ntawm kev teeb tsa cov kav dej. Txhawm rau ua qhov no, qhov sib txawv ntawm huab cua nyob nruab nrab ntawm hauv av thiab cov yeeb nkab, ua tsaug uas tsis muaj dej hauv av, lossis ntsev, lossis alkali yuav nkag mus rau hauv cov kav dej;
• siv cov txheej tshwj xeeb ntawm cov kav dej uas yuav tiv thaiv qhov chaw los ntawm cov av cuam tshuam;
• kho nrog cov tshuaj tshwj xeeb xws li phosphates uas tsim cov yeeb yaj kiab tiv thaiv ntawm qhov chaw.

Kev tiv thaiv txoj kev siv hluav taws xob siv hluav taws xob thiab hluav taws xob hluav taws xob sib pauv hloov pauv:

• hluav taws xob tiv thaiv kom tiv thaiv cov dej ntws tawm;
• kev tiv thaiv anodic, uas ua rau qeeb ntawm cov txheej txheem ntawm kev puas tsuaj hlau;
• kev tiv thaiv cathodic, thaum ncaj qha tam sim no nce qhov tsis kam ntawm cov hlau.

Cov ntaub ntawv tiv thaiv tread

Raws li koj tuaj yeem pom, muaj ntau txoj hauv kev los txhim kho kev tiv thaiv ntawm cov kav dej thiab lwm yam khoom siv hlau. Tab sis lawv txhua tus xav tau kev siv hluav taws xob. Kev tiv thaiv kev tiv thaiv corrosion ntawm cov kav xa dej yog ib qho txiaj ntsig zoo dua, vim tias tag nrho cov txheej txheem oxide raug tso tseg los ntawm kev siv cov alloys ntawm lwm cov ntaub ntawv rau saum npoo ntawm cov kav dej ua los ntawm cov hlau. Cov hauv qab no hais txog qhov pom zoo ntawm txoj kev no:

• kev lag luam thiab kev yooj yim ntawm cov txheej txheem vim tsis muaj DC qhov chaw thiab siv magnesium, zinc lossis aluminium alloys;
• qhov muaj peev xwm ntawm kev siv ib leeg lossis pab pawg kev teeb tsa, thaum lub tswv yim tiv thaiv tread yog xav txog kev coj mus rau hauv tus account cov yam ntxwv ntawm qhov tsim los yog twb tau tsim qhov chaw;
• muaj peev xwm siv tau rau txhua qhov av thiab hauv cov dej hiav txwv / dej hiav txwv, qhov twg nws kim lossis siv tsis tau rau lwm qhov chaw tam sim no.

Kev tiv thaiv kev tiv thaiv tuaj yeem siv los txhim kho kev tiv thaiv corrosion ntawm ntau lub tso tsheb hlau luam, nkoj hulls, tso tsheb hlau luam uas siv rau hauv qhov xwm txheej hnyav.