Corrosion Resistance Experiment of a Vehicle Body

A 60-cycle vehicle accelerated corrosion test was performed to verify the corrosion performance of a pickup. And the effects of different body structures, glue process and galvanized sheet on the corrosion resistance were investigated. The results showed that corrosion resistance of galvanized sheet was better than that of non galvanized sheet, and there was no difference between hot dip galvanized sheet and galvanized sheet when the thickness was the same. Corrosion was more likely to occur when the gap between A-pillar and front wing was smaller than 0.1 mm, but corrosion could be avoided when the gap was larger than 0.2 mm. Appropriate amount of PVC sealant must be applied to welding seams to ensure sufficient corrosion resistance for 6 corrosion test years (60-cycle test). All the above corrosion modes were experimentally studied and theoretically explored in this research.