日期:2012-04-13 10:06
oiling water extraction is suitable for testing soluble hexavalent chromium compounds and weak alkaline extraction suitable for amphoteric metal coatings．The problems existing in present test methods for determination of hexavalent chromium in steel sheet coatings were analyzed．The compliance of RollS directive was discussed．Keywords：steel sheet；coatin9；hexavalent chromium；determination；extraction；boiling water；alkaline；RollS directiveFirst．author’s address：Centre Testing Internati