The exposure test of aluminum automotive wheel hub was carried out under shelter and outdoor at Wanning station for 24 months.The filiform corrosion phenomenon of coated aluminum was found.

• 对铝合金汽车轮毂在海南万宁试验站进行为期24个月的棚下和户外暴露试验,发现涂膜下铝合金发生丝状腐蚀。