ZINC PHOSPHATE (WIRE COATING)

TECHNICAL DATA SHEET

INTRODUCTION

Phosphate coating range in thickness from 1-50 microns but for practical purposes the thickness is usually quantified in terms of weight per unit area .The layer of phosphate coating consists of numerous crystals of very different sizes .It is generally believed that the porosity decreases with increasing thickness of the phosphate coating.
BENEFIT
The primary benefit in phosphating of wires and sections for drawing and profiling lies in its superb adhesion and the survival of the coating even after several passes through the die. The crystalline nature of the phosphate coating offers in the excellent substrate. Use phosphate steel reduces wear of tools and dies and in practice , significant increases in the working life of the diesis found.
APPLICATION
Phosphating of wires is usually based on the immersion method in which coils of wire are lowered into individual baths. The phosphating tankis thus incorporated together with other post pretreatment stages downstream of the pickling plant.
Immediately before immersion phosphating of wire coils, an alkaline pre-rinse is often installed. This serves to neutralize residual acid traces on the incoming material.
PRECAUTION
Wear PVC or rubber gauntless and googles when handling zinc phosphate. Avoid splashing the skin or clothing, washes off on the skin immediately with soap and water. If liquid gets into the eyes, wash out with liberal quantities of clean cold water and obtain immediate medical attention.
THE CONDITIONS OUTLINED IN THE DOCUMENTS ARE TYPICAL FOR MOST INSTALLATIONS, DUE TO INDIVIDUAL PLANT CHARACTERISTICS,HOWEVER VARIATIONS MAYBE REQUIRED, THE GOKEM ENGINEER WILL GIVE ADVICE WHEN NECESSARY.