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Date of Publication:2022-10-04

Journal:材料保护

Volume:50

Issue:3

Page Number:91-94

ISSN No.:1001-1560

Abstract:In order to further clarify the influence of the polarization slope ratio of polarization region where corrosion potential locates on the corrosion potential shift in the process of interference,the effect of alternating current(AC) interference on corrosion potential of X80 pipeline steel in the Ku'erle soil simulated solution was studied by increasing acquisition frequency of the corrosion potential in terms of AC current density and interference time.Resuhs showed that the corrosion potential collected by acquisition frequency at 1 Hz shifted and its offset direction was closely related to the ratio of polarization slope (r) of polarization region where corrosion potential gained by acquisition frequency at 100 Hz.If r was greater than 1,the potential shifted positively;while if r was less than 1,the potential shifted negatively.With the increase of interference time,the offset of corrosion potential barely changed when Jac =10～ 50 A/m2;and when Jac =100～ 400 A/m2,the offset firstly decreased obviously and then kept steady.

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