uggs bestellen Pitting potential of cathodic prote

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Pitting potential of cathodic protection testing methods

Time. Retrace scanning speed up or reduce the threshold current may affect the degree of change occluded solution,[link widoczny dla zalogowanych], so that the measured E value prejudiced JJ. The cathodic protection to achieve the best results,[link widoczny dla zalogowanych], should choose the value of cathodic protection potential of stainless steel in a Thus, when the external potential when the cathodic protection potential is for. Anode current inflow occluded; lost when the outer parts of the cathodic protection potential, the cathode of a simulated occluded cell Figure 3 Er polarization time curve Fig. 3E-r-polarization-timee/trve0ftheSITTIulatedocdudedcellpH Figure 4 and the solution pH value of the occluded relations marked Fig4Dependenceofthereversn】 potentia1. ofthecurrentbetweentheoccludedce} Iandexternalsurface hunger thepHvalue0ftheoccludedsolution current inflow occlusion area,[link widoczny dla zalogowanych], uniform is to be protected. Therefore, we will set the lower limit of the cathodic protection potential, is about 440mV. Table 5 hysteresis loop method the threshold current (Im) on the protection potential () measured values of Tab5Effectofthreshold iv t (,) 0ndeterminationoftheprotecti ~ potential () 3 Conclusions 1) simulated occluded Tuen pool law is the value of the range of a 228 - a 438mV, simulation occluded ET solution method obtained a value range of 221 ~ 428mV, the two basically the same. Electrochemical 1999 is 2) 3) will be limited to the value of pitting under the cathodic protection potential. Protective effect can be best measured by the results of this experiment, about 440mV. AStudyontheCathodeProtectionPotentialAgainstPittingCorrosionXuChtmchunLiuYoupingZhangXiaoboZhaoXuhui (Dept.Appt.Chem .. BeijingUniv.ofChem.Techn .. Beijing100029) AbstractThemethodshavebeend ~ eloNdtodeterminetheprotectionpotentialagainstpittingeormsi ~. Theyarebasedonthetheorythatthepittingprotectionpotential (ED) isactuallythetransitionpotentialofthedirectionofcurrentbentheoccludedcellandtheex-temalsurface (Er). ktSfrom a 220mVto a 440mV (SCE),[link widoczny dla zalogowanych], the1owtofwhichcanheconsideredaS. cathodel * rotectionpotentia1. Thevaluesdeterminedwith References King left Iraq. Stress corrosion cracking. Xi'an: Xi'an Jiaotong University Press. 1985.1 ~ 82 Liu Youping. Localized corrosion protection potential and the inherent relationship between the occluded cell asked. Beijing University of Chemical Technology, 1996, (23) 266 72 Yang Wu, GU Rui-like, Li Qiao Yi Mountain and so on. Localized corrosion of metals, Beijing Chemical Industry Press, 1995109 Liu Youping, Xia Nianyong. Zhao Xuzhen. Pitting protection potential split off. Chinese Society for Corrosion and Protection. 1997, (17) 4241--247 Wu Shun-called method of metal corrosion of a E Beijing: Metallurgical Industry Press. 1993.118

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