Recently, no matter in the South or in the north, with frequent rainstorms and increased air humidity, the white rust of galvanized and aluminized zinc plates will appear frequently.
Generally speaking, the occurrence of white rust on galvanized steel sheet is often the cause of transportation or storage, because the occurrence of white rust represents that the steel coil is in a high humidity state, even soaked in water, sometimes the steel coil will produce condensation due to long-distance transportation or rapid changes in weather, which is also very easy to cause the occurrence of white rust.
How to prevent white rust? What should I do if there is white rust? Xiaobian gives you some advice:
1、 When ordering, choose different treatment according to the subsequent use: including chromic acid treatment, oiling, phosphate treatment or fingerprint resistant treatment;
2、 The galvanized coil shall be covered with rain cloth during transportation. No matter whether it rains at that time or not, if it is transported by ship, the seawater shall not be soaked;
3、 The galvanized coil shall be stored in a place with good ventilation and high terrain. If the humidity is too high, the dryer can also be used;
4、If there is condensation or soaked by water, unpack and dry as soon as possible; for the white rust that has been produced, soak it in oxalic acid, and then wash it with water and dry it;
5、 Follow the principle of first come first use and use as soon as possible to avoid long-term storage of galvanized coil;
6、 Special attention should be paid to high temperature and humidity areas in South China