ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
Tinplate surfaces have been analysed on a microscopic scale for differences in composition which are related to their effectiveness in providing cathodic protection of the underlying steel. Secondary ion mass spectrometric images of a number of elemental and molecular ions have been collected and collated in stacks that represent the three-dimensional distribution of the ions in the tinplate. An iron-tin alloy structure at the interface of the tin and steel appears to be detectable by the measurement of the 176FeSn- molecular ion image. The localized corrosion behaviour of the tinplates studied has been correlated to the microscopic distribution of iron near the outer surface of the tinplate; the presence of such an iron-rich phase could increase the dissolution rate of surrounding tin and thus reduce the effectiveness of the cathodic protection provided to the steel substrate. The steel substrate was shown to have a low but detectable concentration of oxygen from its interface with tin down to a depth of 1-2 μm.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/sia.740171203
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