Stone Impact Damage to Automotive Paint Finishes: Impact Induced Corrosion in Painted Pre-Coated Sheet Steels

Paper #:
  • 932332

Published:
  • 1993-10-01
Citation:
Ramamurthy, A., Sporrong, M., Strom, M., and Strom, G., "Stone Impact Damage to Automotive Paint Finishes: Impact Induced Corrosion in Painted Pre-Coated Sheet Steels," SAE Technical Paper 932332, 1993, https://doi.org/10.4271/932332.
Pages:
17
Abstract:
Electrochemical Impedance Spectroscopy (EIS) and Thermal Wave Imaging (TWI) are complementary techniques which can be used to detect and estimate Impact Induced Corrosion (IIC) at the metal-polymer interface. This paper describes the use of the above techniques to detect Impact Induced Corrosion in a variety of pre-coated and painted sheet steels. It has been possible to show, that IIC is a threshold phenomenon and depends on the type of galvanized coating. Evaluation of IIC, using a high performance indoor accelerated test and preliminary data from the proving grounds are presented in this paper.
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