Studying corrosion in the vane wheel of a submersible pump

✍ Scribed by Sun Zhi; Wang Wenyin; Dong Xiaowen; Lu Chengliang

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 467 KB
• Volume: 2000
• Category: Article
• ISSN: 0262-1762
• DOI: 10.1016/s0262-1762(00)80023-1

✦ Synopsis

Although they provide essential services in a wide range of industries, submersible pumps are perhaps most commonly used to supply cooling water or circulate water. The main reason given for the failure of a submersible pump is usually corrosion, wear and component fracture. In addition, operating efficiency is greatly decreased once the vane wheel begins to corrode. Usually, it is said that "cavitation corrosion" and "abrasion corrosion" on the surface of the vane under conditions of high-speed rotation is the major corrosion behaviour. In studies by Sun Zhi, Wang Wenyin, Dong Xiaowen and LU Chengliang, the corrosion of the vane mainly appeared on the surface of the root and pilot column while there was less corrosion on the surface of the vane body. The electrochemical reactions behind this are analysed here, and the possible protective processes discussed.