metal huosing

As the global penetration rate of electric vehicles continues to rise, the deployment of outdoor charging infrastructure is proceeding at an unprecedented pace. EV charging station housings, serving as the first line of defense for protecting internal electrical components, are continuously exposed to corrosive environments such as rain, condensation, temperature cycling, and road salt spray. The bottom of the housing and the lower edge of the door panel are prime targets for corrosion—these areas are constantly exposed to capillary water absorption from concrete bases or accumulate salt-laden liquid splashed from the road. Once rust forms, it spreads rapidly, leading to coating peeling, reduced structural strength, and even compromising the safety of the internal electrical components. While the NEMA 250 and UL 50E standards provide a graded framework for environmental protection of outdoor electrical enclosures, issues such as insufficient corrosion resistance of the base material (e.g., standard SPCC), a lack of drainage design at the bottom, and inadequate pretreatment before coating […]