Corrosion yog ib qho teeb meem ntawm cov khoom siv tshuaj lom neeg mob taub hau. Kev tsis saib xyuas me ntsis tuaj yeem ua rau cov khoom puas tsuaj, lossis ua rau muaj kev sib tsoo lossis txawm tias muaj kev puas tsuaj. Raws li kev txheeb cais, kwv yees li 60% ntawm kev puas tsuaj ntawm cov khoom siv tshuaj yog tshwm sim los ntawm corrosion. Yog li ntawd, qhov kev tshawb fawb ntawm cov khoom xaiv yuav tsum tau them sai sai rau thaum xaiv cov tshuaj valve.
Cov ntsiab lus tseem ceeb ntawm kev xaiv cov khoom siv:
1. Sulfuric acid yog ib qho tseem ceeb ntawm cov khoom siv raw nrog ntau yam kev siv. Sulfuric acid ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov kub thiab txias muaj qhov sib txawv loj hauv corrosion ntawm cov ntaub ntawv. Cov pa roj carbon steel thiab cam khwb cia hlau muaj kev tiv thaiv corrosion zoo dua, tab sis nws tsis haum rau kev kub ceev ntawm sulfuric acid thiab tsis haum rau kev siv. Cov khoom siv ntawm lub twj tso kua mis valve. Yog li ntawd, cov twj tso kua mis rau sulfuric acid feem ntau yog ua los ntawm high-silicon cam khwb cia hlau thiab high-alloy stainless hlau.
2. Cov ntaub ntawv hlau feem ntau tsis tiv taus hydrochloric acid corrosion. Contrary to hlau cov ntaub ntawv, feem ntau cov ntaub ntawv uas tsis yog-hlau muaj corrosion kuj zoo rau hydrochloric acid. Yog li ntawd, cov roj hmab li qub thiab cov yas li qub nrog hydrochloric acid yog cov kev xaiv zoo tshaj plaws rau kev thauj cov hydrochloric acid.
3. Nitric acid, feem ntau cov hlau yog corroded sai thiab puas 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. Rau kev kub siab nitric acid, titanium thiab titanium feem ntau yog siv. Cov khoom siv alloy.
4. 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, uas yog hnyav rau kub thiab siab concentration acetic acid los yog lwm yam corrosive media. Thaum xav tau, high-alloy stainless hlau li qub lossis fluoroplastic li qub tuaj yeem xaiv.
Post lub sij hawm: Nov-27-2021