Electrode structure for corrosion rate measurement and corrosion rate measurement method

摘要

PROBLEM TO BE SOLVED: To measure a corrosion rate only by charging electrode structure in a measured solution in a liquid reservoir by providing a protective member for surrounding at least a sample electrode, a reference electrode and a counter electrode. SOLUTION: A cable 23a connects a corrosion rate measuring device to a sample electrode 27. A cable 23b connects the corrosion rate measuring device to a reference electrode 28. A cable 23c connects the corrosion rate measuring device to a counter electrode 29. The sample electrode 27 is formed of the same material as piping, for instance, which is a corrosion rate measured object. The reference electrode 28 and counter electrode 29 are formed of the same materail as the sample electrode 27 or material such as gold, silver, platinum or stainless material hard to corrode. The reference electrode 28 is so disposed as not to disturb electric field distribution generated when a current flows between the sample electrode 27 and counter electrode 29. A resin protective cylinder 31 is provided as a protective member for surrounding the sample electrode 27, reference electrode 28 and counter electrode 29.