1. Sulfuric acid Raws li ib qho ntawm cov xov xwm muaj zog corrosive, sulfuric acid yog ib qho tseem ceeb ntawm cov khoom siv raw nrog ntau yam kev siv. Lub corrosion ntawm sulfuric acid nrog txawv concentrations thiab kub yog txawv heev. Rau concentrated sulfuric acid nrog ib tug concentration siab tshaj 80% thiab kub tsawg tshaj li 80 ℃, carbon steel thiab cam khwb cia hlau muaj zoo corrosion kuj, tab sis nws tsis haum rau high-ceev ntws sulfuric acid. Nws tsis haum rau siv los ua cov khoom siv rau cov twj tso kua mis; zoo tib yam stainless hlau xws li 304 (0Cr18Ni9) thiab 316 (0Cr18Ni12Mo2Ti) muaj kev txwv siv rau sulfuric acid media. Yog li ntawd, cov twj tso kua mis rau kev thauj cov sulfuric acid feem ntau yog ua los ntawm high-silicon cam khwb cia hlau (nqus nrum thiab txheej txheem) thiab high-alloy stainless hlau (alloy 20). Fluoroplastics muaj kev tiv thaiv zoo dua rau sulfuric acid, thiab fluorine-lined li qub yog qhov kev xaiv pheej yig dua.
2. Acetic acid yog ib qho corrosive tshaj plaws hauv cov organic acids. Ordinary hlau yuav raug corroded hnyav nyob rau hauv acetic acid nyob rau hauv tag nrho cov concentrations thiab kub. Stainless hlau yog ib qho zoo heev acetic acid resistant khoom. 316 stainless hlau uas muaj molybdenum kuj tseem haum rau qhov kub thiab txias thiab Dilute acetic acid vapor. Rau cov kev xav tau xws li kub thiab siab concentration ntawm acetic acid los yog muaj lwm yam corrosive media, siab alloy stainless hlau li qub los yog fluoroplastic li qub tuaj yeem xaiv.
3. Hydrochloric acid Feem ntau cov ntaub ntawv hlau tsis resistant rau hydrochloric acid corrosion (nrog rau ntau yam stainless hlau cov ntaub ntawv), thiab high-silicon ferro-molybdenum tsuas yog siv nyob rau hauv hydrochloric acid hauv qab 50 ° C thiab 30%. Contrary to hlau cov ntaub ntawv, feem ntau cov ntaub ntawv uas tsis yog hlau muaj corrosion kuj zoo rau hydrochloric acid, yog li roj hmab li qub thiab yas li qub (xws li polypropylene, fluoroplastics, thiab lwm yam) yog qhov zoo tshaj plaws kev xaiv rau thauj hydrochloric acid.
4. Nitric acid. Feem ntau cov hlau yog corroded sai heev nyob rau hauv nitric acid. Stainless hlau yog cov khoom siv dav siv nitric acid resistant. Nws muaj qhov zoo corrosion kuj rau tag nrho cov concentrations ntawm nitric acid nyob rau hauv chav tsev kub. Nws yog ib qho tsim nyog hais tias cov hlau tsis muaj molybdenum (xws li Cov corrosion kuj ntawm 316, 316L) rau nitric acid tsis tsuas yog qis dua cov hlau tsis zoo tib yam (xws li 304, 321), thiab qee zaum txawm tias qis dua. Rau kev kub siab nitric acid, titanium thiab titanium alloy cov ntaub ntawv feem ntau yog siv.
Post lub sij hawm: Sep-26-2021