For Years, Zinc phosphating has been regarded as vital part of high quality mass production. This treatment is also commonly used for wire drawing and cold forming operations. Since, Zinc phosphate coating allows quick drawings and protection of drawing dies from severe wear and tear.
The main benefit in phosphating a wire prior to drawing is that crystalline structure of zinc phosphate coating offers excellent substrate for applied lubricant. Moreover, Phosphate coating not only confer fine decorative finish to the wire but also provide certain level of corrosion protection during storage and transportation.
In case of steel wires, Zinc phosphate coating offers several advantages. It is a well known fact that steel wire has the tendency to create debris in the drawing die which could increase rate of wear and tear in the die which not only reduce the quality of dawn wire but also cause failure of brakes during the drawing operation which can be detrimental for the operator. With the help of phosphate coating all these problems can be eliminated.
HAMBOND-W is an immersion applied zinc phosphate conversion coating material primarily designed to provide heavy zinc phosphate coatings on steel, 500 to 1,500 mg/ft2 for use in wire drawing and sever cold forging operations with lube or salt carrier coatings.
The treatment time should be 15-20 minutes at a temperature of 30-35 °C which is recommended for wire drawing operation