Vim hais tias zinc yog qhov pheej yig tshaj rau lwm yam electroplating hlau, thiab nws txoj kev txhim kho corrosion zoo dua li cov hlau feem ntau, cov txheej txheem thaiv kev tiv thaiv cov hlau uas tawm hauv cov seem tsis tshua, qhov, cov kab nrib pleb, thiab kev txiav tawm. . Vim li no, tus dav screws los yog screws susceptible atmospheric corrosion yog feem ntau galvanized, tab sis tus screws tsis hloov hauv cov duab los yog cov saum npoo yog zoo li ib phaj los yog ib tug pas. Yog li ntawd, lub thickness ntawm galvanized txheej yog tsis tshua zoo nyob rau hauv txhua qhov chaw, thiab thickness ntawm galvanized txheej yog feem ntau lub thickest. Hauv pem hauv ntej ntawm lub xov roob ua raws li thinnest thread hav. Yuav kom tiv nrog qhov ntau lawm ntawm screws, txo nqi thiab nce ntau lawm, tus txheej txheem plating feem ntau yog siv rau cov chim galvanizing. Txoj kev no yog coj los ntawm cov electrode ntawm lub thoob ncej rau lub xaim nyob rau hauv lub thoob, thiab xaim yog nyob rau hauv kev sib txuas nrog cov ntsia hlau thiab ua hluav taws xob. Tig tsig lub hau thiab ua rau lub hau tsis ntswj kom cov screws tuaj rau hauv kev sib cuag nrog cov electrodes tusyees. Txawm li cas los, lub sij hawm no, qhov tam sim no yog sib quas ntus, thiab nws yog qhov nyuaj rau txoj kev ceev ceev tam sim no. Yog li ntawd, lub thickness ntawm galvanized hlau kuj yog yooj yim sib txawv.
Electroplating galvanization tuaj yeem ua tiav nrog ob qho tib si acidic thiab alkaline plating da. Lub plhaub acidic da dej yog ua los ntawm zinc sulfate raws li lub ntsiab tivthaiv. Nws yog pheej yig thiab txuag, lub plating ceev yog ceev, thiab nws yog ib qho yooj yim uas tswj. Nws kuj yog tsawg dua rau hydrogen embrittlement dua alkaline plating da. Txawm li cas los, tus crystallization yog me ntsis coarse, lub gloss pluag, thiab lub peev xwm plating yog pluag. Cov tshuaj alkalin plating yog tsim los ntawm zinc cyanide, txawm hais tias tus nqi ntau dua, tab sis lub plating peev yog zoo, ntev li zoo tau tswj hwm, koj tuaj yeem tau txais ib txheej ci, Yog tias koj ntxiv chromate kho, koj tuaj yeem tau txais Glighter Plating thiab zoo heev corrosion kuj.
Kub-dip galvanizing kuj yog siv los tiv thaiv kev txhuam ntawm qhov chaw ntawm screws, bolts, thiab ceev. Kub dip galvanized screws muaj corrosion kuj zoo dua cov teeb meem tsis zoo, tab sis tus nqi ntau dua thiab cov bolts rau cov txheej txheem muaj zog tsis muaj feem xyuam. Kub-dip galvanizing, vim hais tias qhov saum npoo ntawm txheej yog ib qho yooj yim rau kev nyuaj thiab brittle, tej zaum yuav ua txhaum nyob rau hauv high school kub los yog siab load mob.
Lub zog ntawm cov txheej hauv qhov chaw nyob hauv corrosive linearly ntsig txog nws cov thickness, uas yog, lub thicker lub txheej, ntev dua qhov lifespan, tab sis qhov corrosion tsis kam ntawm sulphide-muaj industrial tsam yog txom nyem, thiab nws tseem nyob rau hauv marine thiab chaw kub thiab muaj xyoob ntoo. Ib qho loj ntawm cov khoom siv tus kheej corrosive yuav tsim thiab yuav tsum tau kho nrog chromate los tiv thaiv nws. Nyob rau hauv Tebchaws Meskas, siv cov khoom siv tho kev sib tw nrog 0.03 mm ntawm cov ntaub ntawv pov thawj. Yog li ntawd, nws tau pom tias qhov nruab nrab ntawm kev ua neej nyob rau hauv ntug zos, chaw ntug dej hiav txwv, thiab chaw ua haujlwm yog txog 3: 2: 1, qhia tias huab cua nyob hauv huab cua, cov txheej xuav yog qhov tshaj plaws Corrosion yog nws tshwm sim vim tias cov pa roj tawm ntawm cov nroj tsuag hauv chaw ua haujlwm muaj ntau cov dej xau (SOx) thiab nitrogen oxides (NOx) uas ua rau cov txheej xuav xuav. Nyob rau ntawm ntug dej hiav txwv, muaj cov ntsev ntau ntawm cov ntsev thiab cov kua ua kua (chlorides) hauv cov cua uas ua rau hlau txhuam, thiab qhov txheeb ze ntawm cov huab cua kuj tseem cuam tshuam rau qhov kev kub ntxhov. Lub koom haum ntawm cov ntaub ntawv tiv thaiv ntawm University of Science thiab Technology Beijing kuj tau ua rau kev sib tsoo ntawm kev sib tsoo ntawm kev sib tsoo ntawm cov txheej hauv cov chaw sib txawv ntawm cov cheeb tsam. Lub sijhawm xeem yog ib xyoo. Nws tau pom tias qhov siab tshaj plaws corrosion rate tau pom nyob rau hauv SO 2 thiab chloride (hiav txwv ntsev) hais nyob rau hauv chaw. Lub cheeb tsam nrog ntub ntub dej ntau tshaj. Cov dej ntws ntub atmospheric vuas pom tias yog qhov tseem ceeb ntawm qhov ua kom tawg, thiab cov kuab paug hauv chaw, tshwj xeeb tshaj yog SO2 thiab chloride, yog lub hauv paus tseem ceeb uas txhawb kev txhuam.
Thaum lub sij hawm tsim khoom, cia khoom, thiab kev thauj mus los ntawm cov hlua khi tsis tau, cov txheej hauv qab yuav tau dawb, tsaus, thiab tsaus muag. Lub ntsiab yog vim li cas cov txheej hauv lub vov tawm yog corroded los ntawm kev sib tiv tauj nrog corrosive media thiab atmospheric noo noo, oxygen, thiab carbon dioxide. qhov tshwm sim ntawm. Yuav kom tiv thaiv tau qhov teeb meem no, nws yog qhov zoo uas yuav tau siv cov ntaub ntawv nrog kev mob zoo tshaj plaws ua ntej screwing. Nyob hauv cov txheej txheem uas tsis muaj teeb meem, cov teeb meem ntawm qhov screws yog cov yuav ua rau cov hluav taws xob xws li acids, alkalis, thiab ntsev kom nkag mus rau hauv lawv, ua rau nws nyuaj los ntxuav thiab ua kom tawg. Nyob hauv kev sib tw, kev ntxhov siab yuav tsum txo kom ntau li ntau tau. Vim yog qhov chaw nyuab siab, nws yooj yim ua rau muaj kev ntxhov siab thaum lub sij hawm dai thiab xeb tawm. Thaum tshav kub-kho cov ntsia hlau, lub thickness ntawm oxide zaj duab xis yuav tsum tau txo kom ntau li ntau tau. Tshwj xeeb, ua ntej lub plating, cov roj thiab xeb ntawm daim nplaim yuav tsum tau muab tshem tawm, thiab lub sij hawm ntawm pickling thiab xeb tshem tawm yuav tsum tau tswj kom tsis txhob cuam tshuam qhov zoo ntawm plating. Lub lag luam ntawm electroplating yuav tsum xyuam xim rau kev siv lub peev xwm ua kom muaj teeb meem zoo dua qub, kom ntxiv dag zog rau kev tswj tsev, thiab tswj kom muaj kev ceev thiab ntxiv tshuaj ntxiv. Tom qab electroplating, nws yuav tsum tau muab ntxuav kom huv si kom tshem tawm cov kev puas tsuaj ntawm lub plating daws thiab organic teeb meem rau lub txheej. Tsis tas li ntawd, lub sij hawm raug ntawm lub hau ntswj nyob rau hauv qhov chaw yuav tsum tau muab txo kom sai li sai tau thiab qhov kev kho sealing yuav tsum tau ua tiav sai li sai tau. Xaiv cov ntawv ntim khoom kom tsim nyog, tsis txhob siv cov khoom yas uas tsis sib xws zinc, thiab pob khoom hlau xws li cov ntawv hlau uas muaj hlau nplaum. Qhov zoo npaum li cas ntawm cov khoom qab zib tuaj yeem raug muab tso rau hauv lub thawv kom txo cov av noo hauv lub thawv, thiab qhov txheeb ze ntawm lub tsev muag khoom yuav tsum tau txo thiab tiv thaiv. Muaj cov pa roj yaig