ElectroPlating Service

UEP utilized two process of plating in Zinc Electroplating which are Rack & Barrel.
The plating processes basically consist of three stages, i.e.

Step 1

Pre-Treatment

Pre-treatment is the preparation of the item for the actual plating step, and typically done in two processes:

Step 2

Plating

Zinc Rack plating is a process used to plate large, delicate or complex parts that cannot be finished through barrel plating.

Step 3

Post-Treatment

Zinc Rack plating is a process used to plate large, delicate or complex parts that cannot be finished through barrel plating.

Pre-Treatment

Pre-treatment is the preparation of the item for the actual plating step, and typically done in two processes:

1. De-scaling / De-rusting
This is done by soaking the items in an acid (usually HCL) to remove heat treatment scales,mill scales, rust, burnt oil , etc.

Note: Over pickling due to too high concentration of acid or excessive time will result in parts damage such as parts become under size or thread and body got corroded. Under pickling will result in insufficient plating coverage or blistering.

Concentration of HCL approx.30%-50%. Time : 1-10mins

2. Degreasing
This is done by soaking the item in a tank or rolling the items in a barrel in an alkaline cleaner solution to remove oil or grease. Please note that scales and oil or grease must be thoroughly cleaned before plating or it will result in un-plated sports, blistering or peeling. Bigger items for rack plating need to be hand scrub after soaking.