Yuav siv hluav taws xob cua sov li cas hauv cov txheej txheem tshem tawm cov roj hauv kev tsim khoom?
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Yuav siv hluav taws xob cua sov li cas hauv cov txheej txheem tshem tawm cov roj hauv kev tsim khoom?
Alkaline degreasing feem ntau yog siv. Kev sib xyaw thiab cov txheej txheem ntawm cov roj tshem tawm cov kua dej yog xaiv raws li cov txheej txheem ntawm cov roj thiab cov khoom siv hlau. Thaum muaj roj ntau nyob rau saum npoo, uas yog, cov roj txheej yog tuab, nplua, thiab nplaum, nws tsis tuaj yeem tshem tau yooj yim siv tsuas yog alkaline degreasing. Lwm txoj hauv kev xws li txhuam cov kuab tshuaj degreasing pretreatment yuav tsum tau siv ua ntej, thiab tom qab ntawd alkaline degreasing. Alkaline degreasing kua yog heev alkaline. Nws yuav hnov mob nrog qee cov hlau thiab muaj kev cuam tshuam loj heev. Yog li ntawd, thaum degreasing txhuas thiab zinc plated qhov chaw, nws yog advisable ua li ntawd nyob rau hauv qis kub thiab tsawg alkali tej yam kev mob. Cov hlau yuav tsum tau kho nrog cov alkalinity siab dua, uas feem ntau tau txais. Txawm li cas los xij, thaum kho cov hlau tsis yog hlau, cov pH ntawm cov tshuaj degreasing yuav tsum tau kho kom haum rau ntau yam. Rau cov khoom xws li txhuas, zinc, thiab lawv cov alloys, pH yuav tsum tau tswj hauv qab 11, thiab lub sij hawm tshem tawm cov roj yuav tsum tsis pub tshaj 3 feeb.
Los ntawm kev xav txog tus nqi, qee tus neeg tawm tswv yim txo qis cov roj tshem tawm, tab sis txo qhov kub thiab txias yog qhov tsis sib haum xeeb rau kev txhim kho kev ua haujlwm. Qhov kub thiab txias, qhov ceev ntawm lub cev thiab tshuaj lom neeg cov tshuaj tiv thaiv ceev ntawm cov roj adhered rau saum npoo thiab tus neeg saib xyuas, thiab cov roj tshem tawm yooj yim dua. Kev xyaum tau pom tias thaum kub nce, cov viscosity ntawm cov roj stains txo, ua kom yooj yim tshem cov roj, tab sis qhov kub thiab txias tsis muaj qhov cuam tshuam. Yog li, xav txog kev siv cov emulsifiers thiab surfactants, seb qhov kub ntawm cov roj tshem tawm puas yog qhov zoo lossis tsis zoo, thiab qhov kub thiab txias yog qhov tsim nyog los tswj? Kuv qhov kev paub yog tias nws yog qhov zoo dua los tswj ntawm 70-80 degree, uas tuaj yeem pab tshem tawm cov kev ntxhov siab uas tshwm sim los ntawm kev siv lub hauv paus hlau thiab txhim kho kev sib raug zoo ntawm cov coatings, tshwj xeeb tshaj yog ntau txheej npib tsib xee.
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