DIN Standards Committee Coatings and Coating Materials
DIN 55655-1
Paints and varnishes - Electro-deposition paints - Part 1: Terminology and general principles
Beschichtungsstoffe - Elektrotauchlacke - Teil 1: Begriffe und allgemeine Grundlagen
Overview
During electro-deposition painting, the non-volatile matter from a water-dilutable deposition paint is deposited on the workpiece by means of an electrophoretic procedure. During this process, the internal and external areas of the workpiece including all voids are reached. Depending on if the workpiece is used as the cathode or anode, differentiation is made between cathodic or anodic deposition. Cathodic electrodeposition painting (CDP) is widespread. By combining binder, pigment and deposition process, a very resistant coating is created on the workpiece after baking which considerably contributes to corrosion protection in internal and external areas. The electrical properties of the material are also important for power consumption of the process (density of volume charge). Since the electro-deposition painting coating is jointly responsible for the overall appearance of the coating structure, a good levelling of the coating without optical defects is usually important. For comprehensive corrosion protection and for sealing the workpiece, additional application of joint sealing materials, adhesives or foams is therefore necessary. Within the electro-deposition baths, contamination by bacteria is possible due to the material entered and the physical conditions (heat, liquid media, carbon sources, etcetera). This part of DIN 55655 specifies terms and definitions and explains the general principles. In the following parts of this standard series, procedures for characterization of electro-deposition paints and test methods are specified. The committee responsible for this standard is NA 002-00-07-09 AK "Automobilbeschichtungen" ("Automotive coatings") at the DIN Standards Committee Coatings and Coating Materials (NAB).
