One important factor affecting crevice corrosion of passive metals is the crevice geometry, e.g., the gap of the crevice. The crevice geometry can be affected by the properties of the materials used as the crevice formers, i.e., a polymeric crevice former can conform to the surface roughness of a metal specimen, which helps the creation of a tighter crevice gap. The objective of this work was to investigate the effects of crevice former materials on the evolution of crevice corrosion damage of Alloy 22 (UNS N06022). The factors that may limit the initiation and slow or stop the propagation of crevice corrosion are addressed. Crevice formers made from ceramic, polymers, and polytetrafluoroethylene (PTFE) tape-covered ceramic are compared in controlled crevice corrosion tests, which are performed under highly aggressive, accelerated conditions. Results show that crevice corrosion of Alloy 22 is affected by the crevice former materials and by the surface finishes of the crevice former and specimen. Four stages of crevice corrosion were observed: initiation, propagation, stifling (corrosion slowed), and arrest (corrosion stopped). In some cases, the corroded alloy can become repassivated after undergoing an amount of corrosion.
Skip Nav Destination
Article navigation
1 October 2010
Research Article|
October 01 2010
Effect of Polymer and Ceramic Crevice Formers on the Crevice Corrosion of Ni-Cr-Mo Alloy 22
X. Shan;
X. Shan
‡
*Corrosion and Reliability Engineering, Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906
‡Corresponding author. E-mail: [email protected]
Search for other works by this author on:
J.H. Payer
J.H. Payer
*Corrosion and Reliability Engineering, Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, OH 44325-3906
Search for other works by this author on:
‡Corresponding author. E-mail: [email protected]
Online ISSN: 1938-159X
Print ISSN: 0010-9312
NACE International
2010
CORROSION (2010) 66 (10): 105005-1–105005-14.
Citation
X. Shan, J.H. Payer; Effect of Polymer and Ceramic Crevice Formers on the Crevice Corrosion of Ni-Cr-Mo Alloy 22. CORROSION 1 October 2010; 66 (10): 105005–1–105005–14. https://doi.org/10.5006/1.3500833
Download citation file:
Citing articles via
Suggested Reading
Comparison of Ceramic and Polymer Crevice Formers on the Crevice Corrosion Behavior of Ni-Cr-Mo Alloy C-22
CONF_MAR2007
Effects of Test Methods on Crevice Corrosion Repassivation Potential Measurements of Alloy 22
CORROSION (July,2009)
Corrosion Behavior of Alloy 22 in Oxalic Acid and Sodium Chloride Solutions
CORROSION (September,2004)