Corresponding Author

Ai_ling DU


A linear polarization method was applied to measure corrosion rate of reinforcing bar of concrete in situ. Generally in the experiment, the area and shape of the reinforcing bar as a working electrode can be changed and adjusted according to our needs. But polarization area cannot be defined when reinforcing bar is polarized in situ, so that a real R p can't be obtained. Thus the purpose of present work is to improve the measurement system. We used the double_ring auxiliary electrodes made by ourselves. The size of the double_ring auxiliary electrodes was adjusted repeatedly until the real polarization area was equivalent to one of the auxiliary electrodes. Using such an auxiliary electrode to measure R p, we obtained the result that the measurement error of R p is about 2.5%. This result can meet the need of measurement in situ.


Reinforcing bar, Linear polarization, Corrosion rate, Concrete

Publication Date


Online Available Date


Revised Date


Received Date



[1 ] ASTMC876 .Standardtestmethodforhalfcellpolarizationofreinforcingsteelinconcrete[M ].Easton :PergamonPress ,1 980 .

[2 ] Hou .WT ,DuAL .Halfcellmethodappliedtohydraulicstructure[J].J .ofShandongTechnology ,1 994,2 4(1 ) :37~ 44.

[3] WuTS .Studymethodusedtocorrosionofmetal[M ].Beijing :MetallurgicalPress,1 993.

[4 ] FeliuS ,JAGonzalez ,etal.Onsitedeterminationofthepolarizationresistanceinareinforcedconcretebeam[A].TheInternationalCorrosionForum[C],1 987.

[5 ] GonzalezJA ,etal.Errorsintheelectrochemicalevaluationappliedtocorrosionofsteelinconcrete[J].Cor rosionScience ,1 985 ,2 5 (1 0 ) :91 7~ 930 .



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.