Channel steel corrosion resistance method
In the process of using the channel steel should be cleaned regularly to remove harmful substances attached to the surface for a long time. Especially in the environment with chloride ions, avoid chloride ions attached to the surface of the channel steel for a long time and concentrate in the water, such as stainless steel for food utensils, each time after contact with food, to wash clean, to prevent the effect of chloride ions, damage passivation film. In addition, the stainless steel pipe of the channel steel to ensure that the wiring is correct, safe ground, carefully finish the electrode surface, correct the electrode viewpoint, if necessary, can be on the lathe processing, the equipment to the spot welding situation.
Annealing of channel steel
Stress relief annealing (no phase change annealing) : the workpiece is heated to Ac1 degrees below (100-200) and then cooled to 160 degrees below the furnace air cooling. It is mainly used to eliminate internal stress, stabilize size, and prevent deformation and cracking. The heating temperature is usually 500℃-650℃.
It is mainly used for castings, forgings, hot rolled profiles and welds of hypoeutectoid steel.
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