E-Coating and Powder Coating Start With Pre-Treatment – 48 hour turnaround

Zinc Phosphate Eight-Stage Pre-Treatment for Superior Quality
One key to assuring the high quality output of H. E. Orr's coating process is the care and attention taken to pre-treat every part. Orr utilizes an eight-stage pretreatment process that establishes an outstanding bonding surface prior to coating. To many, this sounds like more steps than needed, but customers of H. E. Orr appreciate the consistency and quality that the pre-treatment process generates.

Step 1- An alkaline cleansing solution that removes most contaminants5A_Pretreatment
Step 2- A second cleanse in an alkaline solution to remove any contaminants that were not removed in step one. This insures that parts are free of anything that would impair adhesion.

Step 3- Thorough rinsing to remove any solution from the part

Step 4- Second rinse to prep for zinc phosphate activation

Step 5- Zinc phosphate coating. Orr uses non-metallic zinc phosphate, rather than cheaper iron phosphate because it is a crystalline coating that chemically adheres to the substrate. Zinc phosphate is extremely adherent providing a uniform coating with improved coating adhesion properties. It coats better in recessed areas and provides better corrosion resistance. Because of these qualities, it is the standard for the automotive industry and at H.E Orr.

Step 6- Rinse to remove any excess zinc phosphate from the parts

Step 7- Rinse again

Step 8- Water rinse in a deionizer to reduce conduction in the e-coat bath

Different coaters use different methods to pre-treat parts. Iron phosphate is a cheaper process and makes equipment easier to maintain. However, Orr's experience demonstrates that the higher quality provided by zinc phosphate pre-treatment process is worth the effort it takes to deliver a superior quality product.


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