Electrode structure null for corrosion-proof electric potential measurement of oceanic steel

摘要

PURPOSE: To provide a corrosion potential measurement electrode structure stable in a long time and excellent in durability, which is formed out of a corrosion protected body such as a marine steel structure and the like, to which cathodic protection is applied by flow anodic method using aluminum alloys, zinc alloys and the like or by an external power supply method. ;CONSTITUTION: Insulating material 2 is applied around a steel core 1, the surface of which is covered by a stainless pipe 3 including Cr and Mo, which satisfies that (1%Cr by weight+3%μo by weight) is equal to or more than 22, or by a titanium pipe, cables 4 made of metals identical to the aforesaid metals in constitutent are installed at the ends of the pipe, and a remaining metallic surface made of zinc 5 is cased into a circular cylinder shape so as to be formed into a cover, so that the corrosion potential measurement electrode structure is formed up, which is welded to the corrosion protected body in such a way that the core is in a level. Therefore, corrosion potential can be stably measured over a long period of time, the structure is extremely less damaged except the loss in weight of zinc, and is provided with (high durability. Corrosion potential can thereby be monitored at all times for a long time.;COPYRIGHT: (C)1995,JPO