The ED Holes Effect On Corrosion Resistance Of Car Body Design

Since3.15’s party, CCTV-1explored JAC vehicle’s body inside corrosionproblem. There are so many domestic automobile factory began toanalysis the ED effect of their vehicles, anatomy the body, confirm thestatus of the ED coat inside. If the body structure is not reasonable, thepower line cannot get through the inside parts, ED coat cannot reach thecavity structure. At the same time, the acid and alkali which residue inpretreatment process, concentrate and evaporate when it baked in theoven and corrode the panel inside of body. So it has already corrodedinside before sales.The requirements of paint always do not be restrained in design ofbody, so that there are air bags, no ED coat and corrosion, in theenclosure space between the panels as no sufficient conditions for the EDprocess. This paper studies on the influence of the gaps of two panels, thesize of ED holes and the distance of two holes, how to improve thethickness of ED coat, in order to enhance the anti-corrosion. Summariesthe ED coat requirements for the convenience of body design.There are three ways to research ED requirements, for one side,research the though power in the lab, the difference distance betweenthree panels, find the rules of thickness and radius reduce progressivelyby the influents of dimension and distance between the two holes. In the new project A, discus with the body design engineer about setting holes.For another side, combine the3D model of the new body, use CAE soft tosimulation calculated, confirm the new design, continuous improvement,and also summarize the optimization ways of design for ED coat. Finally,anatomy the new vehicle, measure the thickness of ED coat, confirm theconclusion.Brilliance auto is one of the domestic companies which pay moreattention to the body inside ED coat, who continuous improvement onanti-corrosion. It combines the SE and CAE software analyses during thebody design, exposures new vehicles in Hainan for1year, and thenanatomy, so as to control the quality of new product. This paper not onlysummarizes the method of analytic system, but also study the generalrules for the body design. It shall be used as the rules of design in thefuture in Brilliance auto.