SYMPOSIA PAPER Published: 01 January 1995

Corrosion Evaluation of Automotive Trim Material


Bright annealed ferritic stainless steel is used as automotive trim material. A 20% Cr ferritic stainless steel gave adequate corrosion protection in chloride atmospheres. Both 17% Cr materials, 434 and 436, need a Cr flash for good corrosion protection. Electrochemical techniques such as Electrochemical Impedance Spectroscopy (EIS) and Cyclic polarization curves were used to evaluate the corrosion performance. The corroded samples were analyzed with Time-of-flight Mass Spectrometer (TOFSIMS) and Scanning Electron Microscope (SEM). The 20% Cr ferritic stainless steel performed better than the 17% Cr materials in all the tests. Some differences in the corrosion products were observed between the accelerated tests and outdoor exposures.

Author Information

Sabata, A
Armco Research and Technology, Middletown, OH
Drigel, GS
Armco Research and Technology, Middletown, OH
Cooper, TL
Armco Inc., Coshocton, OH
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Developed by Committee: G01
Pages: 152–166
DOI: 10.1520/STP14918S
ISBN-EB: 978-0-8031-5302-8
ISBN-13: 978-0-8031-2015-0