Txoj cai ntawm kev txaus siab tam sim no cathodic tiv thaiv technology

Nyob rau hauv lub ntuj lub xeev ntawm Fe thiab C nyob rau hauv steel, kev sib nrig sib polarization rau corrosion muaj peev xwm EC, tus coj corrosion tam sim no yog IC, thaum lub cathode polarization yog energized, lub peev xwm yog tsis zoo hloov, yog hais tias lub peev xwm polarization rau E1, tag nrho tam sim no yog I1. , thiab corrosion tam sim no raug txo los ntawm IC mus rau I1, lub sij hawm no tus corrosion yog txo, tab sis tsis nres. I1-i1 yog siv cathode tam sim no. Thaum cov ntawv thov tam sim no tseem nce ntxiv thiab lub peev xwm txuas ntxiv mus rau qhov tsis zoo ntawm cov anode equilibrium muaj peev xwm EOFe, qhov corrosion tam sim no poob rau xoom thiab nres qhov corrosion, thiab cov ntaub ntawv tam sim no nce mus rau I2 (qhov tam sim no yog cathodic tiv thaiv tam sim no). Hauv lwm lo lus, qhov sib txawv ntawm qhov qub C thiab Fe yog qhov siab thiab qhov muaj peev xwm sib txawv ntawm lawv tsawg, uas ua rau corrosion tshaj tawm ntawm IC loj. Kev tiv thaiv Cathodic dhau cathodic tam sim no rau cov hlau kom polarize lub cathode thiab hloov lub peev xwm mus rau qhov tsis zoo. Raws li qhov tshwm sim, qhov sib txawv ntawm cathode C thiab anode Fe ntawm cov roj teeb qub corrosion ntawm cov hlau maj mam txo qis thiab qhov kev tawm tsam corrosion txo. Thaum lub peev xwm tsis zoo hloov mus rau qhov sib npaug ntawm lub peev xwm ntawm Fe (lub peev xwm tiv thaiv cathodic yog polarized txog li -0.85V, uas yog txheeb ze rau Cu/CuSO4 electrode), cov hlau muaj kev tiv thaiv tag nrho.