UPDATE SHEET No 5 (DRAFT) - Qualicoat

QUALICOAT SPECIFICATIONS UPDATE SHEET No. 513 th Edition 08.11.12Page 8/810. COMPULSORY DECLARATION OF CHANGES IN FORMULATION OF ALTERNATIVEPRETREATMENTSIn principle, if the chemical composition of the conversion coating remains the same, it shall notbe necessary to apply for a new approval. In practice, this means accepting all the variationsspecified on the technical data sheet to adjust the system to a specific application line in order toachieve the specified coating weight. The chemical product may be supplied as a two‐componentor single‐component system. The chemical manufacturers shall guarantee that the chemicalcomposition of the working solution is essentially the same as that approved by QUALICOAT.Any change in formula that can result in significant changes in the composition of the conversioncoating represents a new product and requires a new QUALICOAT approval.To give a few examples of such changes, we would like to mention some clear‐cut cases:• Any change in the metal content of the coating through substitution, addition, removal, etc. ofthe approved metal system when the products are based on transition metals replacingchrome.• Any change in the polymer composition and, by extension, in the organic components throughsubstitution, addition, removal etc. when they are present in the approved formula.• Any change in the typical appearance of the conversion coating, for example from colourless tocolour.H:\ac2\Q-COAT\BESTIMMU\Updatesheets\13th Edition\E\Update sheet 5_Revised Appendix A6.doc