| 摘要 |
Cathodic protection of heat exchanger tubes by mobile sacrificial anodes is an anticorrosion treatment which is done by means of mobile sacrificial anodes (SA) which pass through the heat exchanger tubes carried by cooling water (H2O). Mobile sacrificial anode, shown in Fig.3 has a form of a ball (1) made of an elastic, porous, polymeric material with the surface covered by metallic elements (A) in the form of points or particles (2) made of metallic material (M2) having lower electrode potential than the metallic material (M1) of the protected heat exchanger tube. Due to the presence of electrolyte i.e. water or sea water, a galvanic cell is formed between the metallic elements (A) and the metallic material of the heat exchanger tubes in which an electron donor is a metallic element (A) having lower electrode potential. The anticorrosion protection of heat exchanger tubes is achieved by transfer of electrons from the metallic elements (A) to the metallic material of the heat exchanger tubes. |
