Qhov tshwm sim ntawm kev ntxhov siab corrosion yuav tsum muaj ib puag ncig corrosion thiab txaus tensile stress

Qhov tshwm sim ntawm kev ntxhov siab corrosion yuav tsum muaj ib puag ncig corrosion thiab txaus tensile stress

1. Kev nyuaj siab corrosion, kub exchangers, thiab tshav kub exchangers yuav tsum muaj ib tug tshwj xeeb corrosion ib puag ncig thiab txaus tensile kev nyuaj siab los tsim kev ntxhov siab corrosion. Cl - yog lwm qhov tseem ceeb ua rau muaj kev ntxhov siab corrosion. Cl - muaj lub vojvoog me me thiab muaj zog nkag mus rau hauv lub zog, ua rau nws yooj yim rau nkag mus rau hauv lub qhov hws me me hauv cov yeeb yaj kiab tiv thaiv, ua rau cov zaj duab xis passivation ua rau hauv zos, thiab nkag mus rau hauv qhov tawg kom tsim HCl, uas ua rau nws tus kheej ua kom nrawm nrawm nrawm ntawm kev xeb. txheej txheem. Nyob rau tib lub sijhawm, H + precipitates ntawm lub ntsis thiab nkag mus rau pem hauv ntej ntug ntawm qhov tawg, uas tuaj yeem ua rau hlau embrittlement [2]. Qhov kub thiab txias yog qhov tseem ceeb ua rau muaj kev ntxhov siab corrosion tawg. Qhov siab dua qhov kub, qhov qis dua qhov concentration ntawm Cl - uas ua rau corrosion, thiab qhov kev nyuaj siab corrosion cracking tshwm sim ntau dua.

2. Electrochemical corrosion, kub exchangers, thiab tshav kub exchangers yog cov feem ntau hom hlau corrosion. Thaum cov hlau nyob rau hauv cov dej txias yog raug rau cov kev daws teeb meem los yog cov huab cua ntub rau lub sijhawm ntev, lub roj teeb micro, los yog lub roj teeb corrosion, yuav tsim rau ntawm cov hlau. Oxidation cov tshuaj tiv thaiv tshwm sim ntawm lub anode, ua rau dissolution ntawm anode thiab txo cov tshuaj tiv thaiv ntawm cathode. Ua rau tsis tu ncua hlau corrosion nyob rau hauv cov dej txias system, yog li hem kev nyab xeeb ntawm lub cev.

3. Qhov kub thiab txias muaj qhov cuam tshuam loj rau cov tshuaj tiv thaiv corrosion, cov khoom siv hluav taws xob, thiab cov khoom siv hluav taws xob sib txawv. Hlau tsis yooj yim corroded nyob rau hauv cov huab cua qhuav, tab sis nws yog yooj yim oxidized rau daim tawv nqaij oxide nyob rau hauv high kub, thiab nws cov carbides yog nquag decarburization cov tshuaj tiv thaiv, txo cov nto lub zog thiab qaug zog txwv ntawm hlau.

4. Biological corrosion, tshav kub exchanger, thiab tshav kub exchanger lom corrosion feem ntau tshwm sim nyob rau hauv cov hlau nto nyob rau hauv kev sib cuag nrog circulating dej thiab lwm yam xov xwm nyob rau hauv cov dej txias system, uas yuav yooj yim ua rau lom corrosion. Yog vim li cas rau cov kab mob lom yog vim li cas cov kab mob siv cov organic corrosion inhibitors ua zaub mov, metabolize lawv los tsim cov kua qaub, ua rau cov hlau tsis muaj zog corrosion tiv thaiv txheej, haus oxygen los ntawm cov metabolism hauv roj ntsha, thiab ua rau tsis sib xws O2 concentration ntawm cov hlau nto, ua rau oxygen concentration corrosion. .

Tom qab xyoo ntawm kev tshawb fawb thiab kev tsim kho, ua ke nrog ntau qhov kev paub ntawm qhov chaw nyob rau hauv kev siv tshuaj tiv thaiv corrosion ntawm tshav kub exchangers, composite ceramic high-temperature anti-corrosion coatings muaj kub tsis kam. Thaum ua ntawv thov kom sov hloov pauv thiab kev sib pauv cua sov, lawv tsim lub ntsej muag kub taub hau, lawv ua rau cov nplaim hluav taws kub ci rau ntawm qhov kub, nrog lub hardness ntawm li 7h. Cov txheej yog du thiab ntxuav nws tus kheej, tiv taus qhov cuam tshuam, tuaj yeem tiv taus acid thiab alkali corrosion rau lub sijhawm ntev, muaj zog adhesion, tsis muaj dej thiab roj resistant, thiab tuaj yeem tiv taus corrosion thiab immersion ntawm cov kuab tshuaj organic. Muaj ib hom kev tiv thaiv corrosion uas tuaj yeem tiv taus lub sijhawm ntev rau hauv cov kuab tshuaj muaj zog thiab cov kuab tshuaj sib xyaw, oxidation corrosion ntawm concentrated sulfuric acid thiab hydrochloric acid, corrosion ntawm cov kua qaub muaj zog, corrosion ntawm high-temperature chlorine gas, corrosion ntawm hydrogen gas. , corrosion ntawm high-temperature seawater, thiab waterproofing thiab corrosion kuj ntawm high kub ntawm 1000 degree. Tsis tas li ntawd, cov txheej txheem tiv thaiv corrosion no muaj kev hnav zoo thiab kev tu tus kheej, Qhov no Zhisheng Weihua anti-corrosion txheej tuaj yeem suav hais tias yog qhov muaj zog tiv thaiv corrosion txheej ntawm cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob hauv ntiaj teb.

Www.superbheater.com