NUMERICAL SIMULATION OF CREVICE CORROSION OF STAINLESS STEELS AND NICKEL ALLOYS IN CHLORIDE SOLUTIONS

The paper describes the development of a new mathematical model of the incubation period of crevice corrosion. The model uses a new treatment of the transport processes, which include both ionic migration and diffusion. An explicit finite-difference technique was applied to a uni-dimensional crevice along the crevice depth, with appropriate boundary conditions at both the crevice tip and bulk solution.The numerical simulation results, using Inconel 625, show that there is a distinct delineation between a metal exhibiting passivity or active crevice corrosion, for a given crevice depth or average crevice gap. If these two dimensions are not accurately determined, then accurate prediction of the incubation period of crevice corrosion is extremely difficult.

• Supplemental Notes:
  • Corrosion, v 46 n 7, July 1990, p 522 [9 p, 37 ref, 9 tab, 10 fig]
• Authors:
  • WATSON, M
  • Postlethwaite, J
• Publication Date: 1990

Language

• English

Subject/Index Terms

• TRT Terms: Corrosion; Mathematical models; Nickel alloys; Simulation; Stainless steel
• Uncontrolled Terms: Numerical models
• Old TRIS Terms: Crevice corrosion
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00698884
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM