A Study On The Influence Of Ballast Water Tank Corrosion Caused By Ballast Water Treatment Of Electrolyzing Seawater

Based on the background that IMO has put forward resolution A.868(20)"Guidelines for the control and management of ships' ballast water to minimize the transfer of harmful aquatic organisms and pathogens", and through the theory analysis and corrosion test, this paper, which is a part of the conjoint project of IMO and China Maritime Safety Administration(MSA): 《The conjoint treatment of ballast water by heating-electrolyzing seawater》 , carries out a pilot study on the impact caused to the metal of ballast tank by using the method of electrolyzing seawater together with analyzing the law and mechanism of corrosion.Firstly, based on the references, the paper summarizes the related problem of ballast water, clarifies the importance, and tersely describes the paper's main contents and meaning to the application of the technology on the treatment of ballast water.Secondly, the paper introduces the technology of electrolyzing seawater for the treatment of ballast water; emphasizes the mechanism of killing the harmful aquatic organisms and pathogens and the possibility of the technology; while at the same time, introduces the laboratory study and draws the conclusion: the technology is a very promising treatment.In chapter 3, the paper analyzes the caustic environment that the tank encounters and the reacts during electrolyzing process; proves that the technology of electrolyzing seawater will accelerate the corrosion at some degree by using related metal corrosion theory.In chapter 4, according to the related standards and the particularity of the caustic medium, the paper puts forward a creationary laboratory metal corrosion test. Through assessing the data, it proves the correctness of the theory analysis and analyzes the law and mechanism.In the end, the paper discusses the corrosion protection for the ballast tank, puts forward proposal on corrosion protection aiming at the technology.