Dec 12nd-15th, Vansko Hardware Limited had visited the ZAK DOORS & WINDOWS EXPO 2019 in Delhi, India, which attached 213 exhibitors from many countries. Exhibitors from home and abroad bring their latest technology, equipment and products, as well as the collision of thoughts and the exchange of the friendship. Vansko is mainly in manufacturing stainless steel door hardware. Vansko will be hard to develop the India emerging market.
After receiving the precision-cast stainless steel product and we did a Salt Fog Test after polishing , and the problem is shown in below picture.
But why does this problem occur?