First, magnesium alloy die-castings require cleaning with a cleaning agent prior to powder coating. Generally, two main factors cause poor adhesion: inadequate cleaning by the cleaning solution, or secondary contamination in the workshop post-cleaning. If attributing the issue to the die-casting release agent, it is likely either: (1) the release agent was applied too concentratedly, forming a thick residual film that fails to decompose at processing temperatures, leading to excessive residue that compromises cleaning and powder coating effectiveness; or (2) the release agent uses unsuitable raw materials, resulting in excessive adhesion at high temperatures that impairs subsequent processes.
For more information about 100 Questions(51):Could difficulties in powder coating die-castings be related to release agent or die-casting auxiliary materials, and if you need customized die-casting release agent, please contact 15021483232 (same as Wechat)
