Methods of Characterizing Phosphate Coatings on Automotive Sheet Steels

Document Number: 862006

Date Published: December 1986

Author(s):
D. D. Davidson - Chrysler Corp.
M. L. Stephens - Chrysler Corp.
L. E. Soreide - Chrysler Corp.
R. J. Shaffer - National Steel Corporation, Product Application Center, Livo

Abstract:
A review is made of some of the existing methodologies for assessing phosphate characteristics on automotive sheet steels. Data obtained from on-line processing of zinc and zinc-iron substrates are presented comparing phosphate attributes to performance in the Chipping Corrosion Test. Phosphate characteristics measured were: crystal size; nickel content; coating weight; porosity; alkali solubility. A definitive relationship between these characteristics and chipping corrosion performance was not found.

File Size: 689K
Product Status: In Stock

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