Study of Cavitation Corrosion Behaviors and Mechanism of Carbon Steel in Neutral Sodium Chloride Aqueous Solution

• Published in: Corrosion (Houston, Tex.) Tex.), 2005-11, Vol.61 (11), p.1061-1069
• Main Authors: Liu, J., Lin, Y., Yong, X., Li, X.
• Format: Article
• Language: English
• Subjects: Applied sciences; Aqueous solutions; Brines; Carbon steel; Carbon steels; Cathodes; Cathodic dissolution; Cavitation; Cavitation corrosion; Cavitation erosion; Corrosion; Corrosion effects; Corrosion environments; Corrosion mechanisms; Corrosion prevention; Corrosion tests; Dissolution; Dissolved oxygen; Electrochemical analysis; Electrochemical corrosion; Electrochemistry; Electrode polarization; Electron microscopy; Exact sciences and technology; Metals. Metallurgy; Saline water; Scanning electron microscopy; Sodium; Sodium chloride; Steel; Synergism; Testing time; Weight loss
• ISSN: 0010-9312; 1938-159X
• DOI: 10.5006/1.3280622

ABSTRACTIt is known to us that metal corrosion in a flowing corrosive medium, especially under the cavitation condition, is very heavy.1 Cavitation corrosion is a common type of corrosion phenomenon that takes place in liquid-handling and hydraulic machinery, such as in irrigation works, electric power, the coal industry, metallurgy, and chemical industries, among others.2-3 Cavitation corrosion can cause a variety of materials in application to become damaged, and this attack also leads to fatigue and material removal. In particular, some unexpected catastrophic or early failures of mechanical equipment caused by cavitation corrosion exposed to flowing media may become a limiting factor in the development of new industrial techniques and engineering systems. It is suggested that a full understanding of the cavitation corrosion within the industrial environment is paramount.4 This type of materials corrosion has received extensive attention.5-6 However, because cavitation erosion of materials is very complex and represents an interdisciplinary field, including not only materials science but also fluid hydrodynamics and cavitation, its study is very difficult. It is generally considered that the overall damage of cavitation corrosion arises from both mechanical erosion and electrochemical corrosion, including the interaction between the two under corrosive media conditions.1 Studies7-9 about the relative significance of corrosion, erosion, and the interaction between them for cavitation corrosion are widely discussed by now. Some authors10 think that the cavitation corrosion of materials is mainly caused by erosion that involves the interaction of hydrodynamic, mechanical, metallurgical, and chemical factors. Others11-12 suggest that the presence of the diffusion of dissolved oxygen and aggressive ions in the brine for cavita-