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2. Chromium‐free pre‐treatments prior to painting
3. M. Kendig, M. Cunningham, L. Warren, S. Jeanjaquet, Minutes of the Fourth Annual Workshop on Chromate Replacements in Light Metal Finishing, Sandia Report SAND94-3010. UC 600, 1996, pp. 93–109
4. L. Wilson, B.R.W. Hinton, AU-B-1,485,888