Boundary element analysis of corrosion problems for pumps and pipes
- Ebara Research Co., Ltd., Fujisawa, Kanagawa (Japan). Center for Fluids and Mechanical Engineering
- Tokyo Inst. of Technology (Japan)
Three-dimensional (3D) and axi-symmetric boundary element methods (BEM) were developed to quantitatively estimate cathodic protection and macro-cell corrosion. For 3D analysis, a multiple-region method (MRM) was developed in addition to a single-region method (SRM). The validity and usefulness of the BEMs were demonstrated by comparing numerical results with experimental data from galvanic corrosion systems of a cylindrical model and a seawater pipe, and from a cathodic protection system of an actual seawater pump. It was shown that a highly accurate analysis could be performed for fluid machines handling seawater with complex 3D fields (e.g. seawater pump) by taking account of flow rate and time dependencies of polarization curve. Compared to the 3D BEM, the axi-symmetric BEM permitted large reductions in numbers of elements and nodes, which greatly simplified analysis of axi-symmetric fields such as pipes. Computational accuracy and CPU time were compared between analyses using two approximation methods for polarization curves: a logarithmic-approximation method and a linear-approximation method.
- OSTI ID:
- 191365
- Report Number(s):
- CONF-950740-; ISBN 0-7918-1337-1; TRN: IM9610%%366
- Resource Relation:
- Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Fatigue and crack growth: Environmental effects, modeling studies, and design considerations. PVP-Volume 306; Yukawa, S. [ed.] [Yukawa (Sumio), Boulder, CO (United States)]; Jones, D.P. [ed.] [Bettis Atomic Power Lab., West Mifflin, PA (United States)]; Mehta, H.S. [ed.] [GE Nuclear Energy, San Jose, CA (United States)]; PB: 331 p.
- Country of Publication:
- United States
- Language:
- English
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