Kev sib raug zoo ntawm Kev Tiv Thaiv -corrosion Txheej Kev Ua Haujlwm ntawm Elastic Clips thiab Kev Pabcuam Lub Neej ntawm Fastening Systems
Qhov twg los tiv thaiv- txheej txheej corrosion yuav tsum nyiam rau cov hlua khi hauv cov ntug dej hiav txwv thiab cov ntsev-alkali av railways, thiab vim li cas?
Zinc-cov txheej txheem txhuas lossis zinc flake (Dacromet) txheej yuav tsum tau ua qhov tseem ceeb tshaj li ib txwm kub-dip galvanizing. Qhov siab - ntsev tsuag ib puag ncig ntawm ntug dej hiav txwv railways thiab siab corrosive ion cov ntsiab lus ntawm saline-alkali av ua rau kub-dip galvanized coatings rau undergo sai electrochemical corrosion, nrog ib tug tsis ua hauj lwm voj voog ntawm tsuas yog 3-5 xyoo. Zinc-aluminum coatings, with high aluminum content, form a dense oxide film, offering salt spray resistance of over 1000 hours-more than three times that of hot-dip galvanizing. Dacromet coatings nthuav tawm cov kua qaub thiab alkali corrosion kuj zoo heev uas tsis muaj hydrogen embrittlement txaus ntshai, tiv thaiv cov tshuaj yaig hauv av saline-alkali, thiab lawv lub neej kev pabcuam tuaj yeem tshaj 10 xyoo, txo cov nqi kho thiab hloov pauv.
Cov kev pab cuam loj dab tsi yog tshwm sim los ntawm qhov tsis txaus ntawm elastic clip los tiv thaiv -corrosion txheej?
Tsis txaus adhesion ua rau txheej tev thiab flaking nyob rau hauv lub tsheb ciav hlau kev co, nthuav tawm cov clip substrate ncaj qha mus rau corrosive ib puag ncig. Cov chaw tev tawm dhau los ua anodes hauv lub cell corrosion, ua rau hauv zos pitting, uas tsim cov ntsiab lus kev ntxhov siab thiab ua rau muaj kev ntxhov siab corrosion hauv cov clips. Cov kab nrib pleb no nthuav tawm sai sai nyob rau hauv kev sib hloov ntawm cov khoom thauj, thaum kawg ua rau kev sib tsoo tam sim ntawd thiab ua rau muaj kev nyab xeeb xws li kev tsheb ciav hlau loosening thiab ntsuas qhov dav. Tsis tas li ntawd, cov khib nyiab pov tseg tuaj yeem nkag mus rau qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob
Dab tsi ua rau "hydrogen embrittlement" hauv kub-dip galvanized elastic clips, thiab yuav ua li cas zam nws?
Thaum kub -dip galvanizing, elastic clips nqus hydrogen atoms thaum pickling thiab galvanizing; cov atoms diffuse mus rau hauv cov hlau matrix, embrittling cov ntaub ntawv - ib tug phenomenon hu ua hydrogen embrittlement. Raws li cov khoom siv elastic heev, cov clips nyob rau hauv ntev - lub sij hawm hloov kev ntxhov siab pom lawv cov kev qaug zog txo qis dua 40% vim hydrogen embrittlement, ua rau cov pob txha tawg muaj feem ntau. Kev tiv thaiv kev ntsuas muaj xws li: kev kho dehydrogenation ntawm clips ua ntej galvanizing (cua sov rau 200-220℃rau 2-4 teev kom tso cov hydrogen atoms); optimizing cov txheej txheem pickling kom luv lub sij hawm pickling thiab txo hydrogen absorption; thiab siv cov txheej txheem qis-hydrogen embrittlement galvanizing xws li nqus galvanizing los tswj hydrogen infiltration ntawm qhov chaw.
Dab tsi tshwj xeeb yuav tsum tau ceev faj thaum lub sij hawm installation ntawm elastic clips nrog sib txawv los tiv thaiv -corrosion txheej?
Kub-dip galvanized clips muaj ib tug du nto, yog li qhov tsim nyog torque coefficient yuav tsum tau xaiv thaum lub sij hawm installation kom tsis txhob muaj tsis txaus preload los ntawm kev sib txhuam tsawg. Zinc flake (Dacromet) coatings muaj qhov hardness tsawg, yog li cov cuab yeej ntse raug txwv tsis pub tawm tsam thaum lub sijhawm teeb tsa los tiv thaiv txheej khawb thiab tev. Zinc- txhuas coated clips yuav tsum tau tshwj xeeb cais thaum lub sij hawm thauj mus los thiab stacking kom tsis txhob txheej puas los ntawm kev sib txhuam. Tom qab txhim kho tag nrho cov coated clips, txheej txheej yuav tsum tau kuaj xyuas; txhua qhov kev puas tsuaj yuav tsum tau kho tam sim nrog cov tshuaj tiv thaiv tshwj xeeb -corrosion kho cov neeg ua haujlwm kom tsis txhob raug cov substrate.
Yuav ua li cas kom paub sai sai ntawm kev ncaj ncees thiab adhesion ntawm elastic clip los tiv thaiv -corrosion txheej ntawm qhov chaw?
Txheej kev ncaj ncees tuaj yeem kuaj tau siv lub ntsuas hluav taws xob hluav taws xob: kho qhov ntsuas hluav taws xob kom haum rau cov txheej txheej tuab, luam theej duab clip nto -yog tias tsis muaj hluav taws xob tshwm sim, txheej txheej tsis muaj pinholes thiab kev puas tsuaj, thiab kev ncaj ncees yog tsim nyog. Adhesion tuaj yeem kuaj tau siv "kab xev tev txoj kev": cov qhab nias hla -hatch marks ntawm txheej nrog cov hniav, siv daim kab xev tshwj xeeb thiab nias kom ruaj khov, ces tev tawm sai sai. Yog hais tias lub txheej txheej txheej yog tsawg dua los yog sib npaug rau 5%, adhesion yog tsim nyog. Tsis tas li ntawd, kev tshuaj xyuas qhov muag ntawm qhov clip saum npoo kom tsis muaj tev, hlwv, lossis flaking tuaj yeem txiav txim siab ua ntej txheej txheej zoo.