Kev sib raug zoo ntawm kev tiv thaiv -corrosion txheej ntawm elastic bar thiab kev sib koom tes tiv thaiv kev daws teeb meem hauv ntau qhov chaw
Vim li cas thiaj yuav tsum muaj cov tshuaj tiv thaiv-corrosion txheej ntawm elastic clips qhia txog peb qhov -theem compatibility ntawm "substrate- primer-topcoat"?
Elastic clip substrates yog siab -lub zog alloy steel nrog nto oxide nplai thiab seem kev ntxhov siab; cov primer yuav tsum tsim cov tshuaj sib txuas nrog lub substrate los xyuas kom meej adhesion, thiab topcoat yuav tsum muaj lub cev thiab tshuaj zoo sib xws rau cov primer kom tsis txhob interlayer tev. Incompatibility ntawm primer thiab substrate ua rau tag nrho cov txheej detachment; Incompatibility ntawm topcoat thiab primer ua rau "interlayer cracking," tso cai rau corrosive media nkag mus rau hauv cov kab nrib pleb thiab ncaj qha erode lub substrate. Peb- qib sib raug zoo yog lub hauv paus ntawm txheej tiv thaiv- tsis ua hauj lwm hauv ib qho txuas ua rau corrosion qaug zog tawg ntawm clips nyob rau lub sijhawm luv.
Dab tsi yog qhov tseem ceeb ntawm kev sib raug zoo tsim rau elastic clip los tiv thaiv -corrosion txheej nyob rau hauv ntug dej hiav txwv ntsev tsuag ib puag ncig?
Lub ntsiab corrosive nruab nrab nyob rau hauv ntug dej hiav txwv ntsev tsuag ib puag ncig yog chloride ions, uas muaj zog permeability thiab pitting zog. Lub compatibility tsim tsom rau ib tug "barrier primer + ntsev -spray resistant topcoat" ua ke: cov primer yog zinc-nplua nuj epoxy, qhov twg zinc hmoov ua sacrificial anode tiv thaiv nrog cov clip substrate, thiab epoxy pawg khi nruj nreem rau lub substrate, thaiv cov chloride ion nkag mus rau hauv; lub topcoat yog polyurethane, uas muaj zoo heev compatibility nrog epoxy primer, ib tug ntom ntom clips, thiab lawv superior ntsev tiv thaiv lub neej. xyoo.
Cov teeb meem tshwj xeeb dab tsi ua rau cov kua qaub-alkali corrosion ib puag ncig hauv thaj chaw tshuaj lom neeg ua rau muaj kev sib haum xeeb ntawm elastic clip txheej?
Acid los yog alkaline gases (piv txwv li, sulfur dioxide, ammonia) nyob rau hauv chemical aav reacts chemically nrog coatings, ua puas interlayer adhesion. Acid ib puag ncig neutralize alkaline pawg ntawm epoxy primer, txo kev sib raug zoo ntawm topcoat thiab primer thiab ua rau blistering; alkaline ib puag ncig hydrolyze lub polyurethane topcoat, ua rau cov txheej nkig thiab nquag detachment. Tsis tas li ntawd, qhov kub hloov pauv loj hauv thaj chaw tshuaj lom neeg ua rau muaj kev sib haum xeeb tsis ua haujlwm vim qhov sib txawv ntawm thermal expansion coefficients ntawm txheej txheej thiab substrate. Cov kev sib tw no xav tau cov txheej txheem txheej txheej kom tsis yog tsuas yog muaj tshuaj lom neeg, tab sis kuj tseem tuav ntev - lub sij hawm interlayer compatibility.
Yuav ua li cas compatibility tsim "Dacromet txheej" rau elastic clips txawv ntawm cov tsoos xim txheej?
Dacromet txheej yog dej-raws li zinc-chromium txheej uas tsim "tshuaj lom neeg hloov pauv zaj duab xis" nrog cov clip substrate, tshem tawm qhov xav tau ntawm primer thiab ncaj qha sib txuas rau lub substrate, yog li tsis txhob cuam tshuam cov teeb meem interlayer compatibility. Tsis zoo li cov xim pleev xim ib txwm siv, lub topcoat rau Dacromet yuav tsum yogacrylic coblos yogfluorocarbon cob, raws li lawv muaj cov tshuaj lom neeg sib raug zoo nrog Dacromet thiab tuaj yeem tiv taus qhov kub ntawm Dacromet curing. Lub caij no, Dacromet muaj qhov nro qis; Kev kho plasma yuav tsum tau ua ua ntej daim ntawv thov topcoat txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm
Yuav ua li cas txiav txim siab qhov tsis sib haum xeeb ntawm elastic clip coatings los ntawm kev yooj yim ntawm - qhov chaw xeem?
Cov txheej txheem tseem ceeb yog cov "daim kab xev tev xeem + hla - txiav xeem." Daim kab xev tev: Siv 3M siab- lub zog daim kab xev rau cov txheej txheej thiab rhuav tshem nws sai sai- tsis muaj txheej txheej qhia pom zoo substrate- txheej txheej; ib feem lossis tag nrho detachment qhia txog kev ua tsis tau zoo. Hla- txiav kev sim:- daim kab xev hlais ntawm cov hniav tsuas yog txheej txheej, tom qab ntawd tev tawm detach, interlayer compatibility tau ua tsis tau tejyam; yog hais tias ob qho tib si primer thiab substrate detach, substrate - primer compatibility tau ua tsis tau tejyam ntxiv, soj ntsuam cov hlwv ntawm lub txheej txheej uas tsis xeb yog ib tug zoo cim ntawm compatibility tsis ua hauj lwm, yuav tsum tau tam sim ntawd hloov clip.