Electroplating process and the role of each process

1. Basic operations

(Polish → polishing) → → skim degreasing → washing → hanging on (electro-polishing or chemical polishing) → acid activation → (pretreatment) → → washing → plating (reprocessing) → washing → drying → hang → testing under the packaging

2. Each process role

Pre-treatment: all of the processes known as pretreatment before plating, aimed at trimming the surface, remove surface oils, rust, oxide film for subsequent deposition of coatings to provide the desired plating surface. pretreatment mainly affectsthe appearance, combined with the force, according to the statistics, 60% of the plating defect is caused by poor pre-treatment, Pretreatment occupies a very important position in the electroplating process. in electroplating technology for developed countries, attaches great importance to pretreatment, pretreatment accounted for half or more of all plating, surface is in good condition which can be coated and greatly reduce the wastage rate.

Spray sand: removed parts surface of rust, welding slag, product carbon, old paint layer, and other dry of oil; removed casting, forging or hot processing Hou parts surface of type sand and oxidation skin; removed parts surface of Burr and and directional mill marks; reduced parts showed that of rough degrees, to improve paint and other coating of attached with force; makes parts is diffuse reflection of elimination light State

Polish: get rid of the parts that the burrs, rust, scratches, welding, welding, and trachoma, scale and other macro-defects, to improve smoothness and plating quality.

Polishing: polishing is designed to further reduce the roughness of the surface and a polished look. mechanical polishing, polishing, Electropolishing, and so on.

Skim oil removal: get rid of the oil on the surface of the workpiece. organic solventdegreasing, chemical oil and electrochemical deoiling, wipe oil, oil drum and the like.

Pickling: get rid of the rust and oxide film on the surface of the workpiece. chemical and electrochemical pickling acid.