| 摘要 |
<p>A portable apparatus for measuring resistivity comprising: i) a voltage source, ii) a gel-state electrode which comprises a confined gel-state mass of high constant conductivity and a suitable conductive electrolyte, and iii) a second electrode. The second electrode may be a gel-state electrode or a solid-state electrode comprising a metallic probe. Methods for using the apparatus are also described. The apparatus can be used to measure the resistivity of fibre reinforced plastics and coatings on metallic substrates, including reinforced concrete. The remaining effective life of a coating, for instance, may be calculated from the resistance values monitored by means of non-linear regression analysis and extrapolation.</p> |
