DACROET txheej yog dab tsi?

2024-09-05 IB

Dacromet txheejyog zinc-aluminium hlau txheej siv rau ferrous hlau (xws li hlau, cam khwb cia hlau, thiab lwm yam hlau alloys) los tiv thaiv lawv tiv thaiv corrosion. Cov txheej txheem feem ntau yog siv los ntawm immersing cov hlau qhov chaw nyob rau hauv ib tug dej-raws li muab tshuaj txhuam los ntawm finely hmoov zinc thiab txhuas, thiab ces ci lawv nyob rau hauv high kub. Cov txheej txheem no ua rau muaj kev sib txuas ntawm cov hlau nplaum ntawm cov khoom coated thiab cov khoom siv hauv paus.

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Lo lus "Dacromet" yog lub npe lag luam, tab sis nws tau dhau los siv los piav txog hom txheej txheej txheej txheem no. Nws tso tseg cov kauj ruam pickling uas yog indispensable nyob rau hauv ib txwm electroplating txheej txheem, yog li zam lub tsim ntawm ib tug loj npaum li cas ntawm acid-, chromium-, thiab zinc-muaj dej khib nyiab. Tag nrho cov txheej txheem ntau lawm ua tiav xoom cov dej khib nyiab pov tseg, ua tiav cov khoom siv ntsuab tiag tiag thiab teeb tsa kev tiv thaiv ib puag ncig rau kev lag luam kho qhov chaw. Qhov no feature tsis tsuas yog teb rau kev hu rau lub ntiaj teb no sustainable kev loj hlob, tab sis kuj yeej lub siab nyiam ntawm ntau tus neeg tau txais kev pab uas xyuam xim rau kev tiv thaiv ib puag ncig.

Cov txheej txheej muab kev tiv thaiv corrosion zoo heev, tuaj yeem tiv taus qhov kub thiab txias, thiab tsis yooj yim flake tawm, ua rau nws zoo tagnrho rau cov khoom siv tsheb, kho vajtse, thiab lwm yam kev siv uas yuav tsum tau ua kom ntev thiab ua haujlwm hnyav. Txawm li cas los xij, nws yuav tsum tau muab sau tseg tias qhov tseeb muaj pes tsawg leeg thiab cov qauv ntawm daim ntawv thov tuaj yeem sib txawv, thiab kev tshawb fawb txuas ntxiv txhim kho nws cov khoom thiab nthuav dav nws cov kev siv.

♦ Cov nyhuv tiv thaiv ntawm Dacromet zaj duab xis txheej ntawm cov hlau substrate

1. Kev Tiv Thaiv Kev Tiv Thaiv

Dacromet txheej tsim ib qho kev thaiv lub cev uas cais cov hlau substrate los ntawm cov khoom corrosive xws li ya raws, oxygen, thiab tshuaj lom neeg. Qhov kev thaiv no tiv thaiv cov ntsiab lus los ntawm kev sib cuag ncaj qha nrog cov hlau, yog li inhibiting qhov tsim ntawm xeb thiab lwm yam corrosion.

2. Kev Tiv Thaiv Kev Txhaum Cai

Dacromet txheej feem ntau yog ua los ntawm zinc thiab txhuas, ob qho tib si ntawm cov khoom siv hluav taws xob ntau dua li hlau. Nyob rau hauv cov cheeb tsam uas cov txheej yuav raug khawb los yog puas, cov hlau ua raws li kev txi anodes, corroding preferentially rau hlau. Qhov no txhais tau tias lawv yuav xeb ua ntej lub hauv paus hlau ua, yog li txuas ntxiv lub neej ntawm cov hlau tivthaiv.

3. Thermal stability

Cov txheej yog ruaj khov ntawm qhov kub thiab txias, uas ua rau nws tsim nyog rau kev siv qhov chaw uas cov coated yuav raug tshav kub. Qhov kev ruaj ntseg no kuj tso cai rau kev siv Dacromet-coated qhov chaw nyob rau hauv ib puag ncig uas lwm cov txheej yuav degrade.

4. Adhesion

Cov txheej txheem ci thaum lub sij hawm daim ntawv thov ntawm Dacromet tsim ib tug muaj zog metallurgical daim ntawv cog lus ntawm lub txheej thiab substrate. Qhov no muaj zog adhesion pab tiv thaiv lub txheej los ntawm flaking los yog tev tawm nyob rau hauv ib txwm tej yam kev mob, kom ntseeg tau kev tiv thaiv mus ntev.

5. Tshuaj tiv thaiv

Dacromet coatings muaj kev tiv thaiv zoo rau ntau yam tshuaj, nrog rau cov kua qaub thiab alkalis, ntxiv dag zog rau lawv cov peev xwm tiv thaiv hauv ib puag ncig kev lag luam.

Kev sib tw tseem ceeb ntawm Dacrometnyob rau hauv nws zoo heev corrosion kuj. Nrog cov txheej tuab ntawm tsuas yog 8 microns, nws tuaj yeem pom kev tiv thaiv corrosion nyob deb tshaj li 7-10 npaug ntawm cov tsoos electroplating zinc hauv kev ntsuam xyuas ntsev. Cov huab cua txawv txawv no ua rau Dacromet txheej yog qhov kev xaiv zoo tshaj plaws rau cov khoom siv hauv cov cheeb tsam hnyav. Txawm hais tias nws yog ntsev tsuag yaig nyob rau hauv marine engineering los yog tshuaj corrosion nyob rau hauv kev lag luam teb, Dacromet tuaj yeem muab cov khoom tiv thaiv kev tiv thaiv kom ntseeg tau tias lub sijhawm ntev thiab ruaj khov ntawm cov khoom siv.

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