Cov cua kub sib txawv tau siv dav hauv kev lag luam roj refining, thiab lawv qhov tseem ceeb yog tus kheej - pom tseeb. Kev siv tus nqi ntawm cov khoom siv hluav taws xob sib pauv ncaj qha cuam tshuam rau kev ua haujlwm thiab tus nqi ntawm cov txheej txheem roj refining. Cov ntaub ntawv pov thawj qhia tias cov khoom siv hluav taws xob sib pauv tau kwv yees li ib - tsib feem pua ntawm kev nqis peev hauv chemical engineering tej yaam num. Yog li ntawd, kev siv tus nqi thiab lub neej ntev ntawm cov khoom siv hluav taws xob sib txawv yog cov teeb meem tseem ceeb uas tsim nyog kawm. Corrosion yog ib qho tseem ceeb ntawm kev puas tsuaj rau cov khoom siv hluav taws xob, thiab nws yog qhov dav thiab dav. Kev daws qhov teeb meem corrosion yog sib npaug los daws cov hauv paus ntsiab lus ntawm kev puas tsuaj rau cov khoom siv hluav taws xob.
1. Corrosion Inhibitors Corrosion inhibitors nrog chromate yog cov khoom tseem ceeb uas feem ntau siv hauv cov dej txias. Chromate ions yog ib qho anodic (txheej txheem) inhibitor, thiab thaum ua ke nrog cov cathodic inhibitors tsim nyog, lawv tuaj yeem ua tiav kev tiv thaiv kev tiv thaiv zoo thiab kev lag luam.
Chromate-Zinc-Polyphosphate: Polyphosphates yog siv vim lawv ntxuav cov hlau thiab muaj peev xwm tiv thaiv corrosion. Polyphosphates tuaj yeem hloov pauv mus rau orthophosphates, thiab lawv tuaj yeem tsim cov colloidal cations loj nrog calcium, inhibiting cathodic txheej txheem.
Chromate-Zinc-Phosphonate: Txoj kev no, zoo ib yam li yav dhau los, siv sodium phosphonate es tsis yog polyphosphate. Aminomethylimide phosphate kuj tseem siv tau rau hauv cov xwm txheej uas tus nqi pH siab dua li tau teev tseg rau polyphosphate. Aminomethylimide phosphonates tuaj yeem tiv thaiv kev tsim cov nplai thiab tswj cov calcium ntsev los nag txawm nyob ntawm pH 9.
Chromate-Zinc-Hydrolyzed Polyacrylamide: Cov nyhuv dispersing ntawm hydrolyzed polyacrylamide, cationic copolymer, tuaj yeem tiv thaiv lossis cuam tshuam cov nplai thiab fouling tsim.
2. Electrochemical Protection: Cathodic thiab anodic tiv thaiv yog ua haujlwm. Kev tiv thaiv Cathodic siv cov khoom siv hluav taws xob sab nraud DC los ua cov hlau nto cathode, uas ua rau muaj kev siv hluav taws xob ntau thiab nqi. Kev tiv thaiv Anodic txuas cov khoom siv hluav taws xob sib txuas rau lub anode ntawm cov khoom siv hluav taws xob sab nraud, ua rau cov yeeb yaj kiab passivation rau ntawm cov hlau nto, yog li muab kev tiv thaiv.
