|Aluminium Ion Content:||500PPM||Package:||25kg/drum|
powder coating pretreatment system,
metal pretreatment process
Low Foam Metal Pretreatment Chemicals Aluminum Spray Cleaning Agent
Metal Pretreatment Chemicals Application
Metal Pretreatment Chemicals is suitable for degreasing aluminum aluminum alloymagnesiummagnesium alloy work pieces in dipping and spray.
Metal Pretreatment Chemicals Introduction :
consist of weak acid, low foam surface active agent and zwitterion to avoid corrosion and acid fog.
Bath solution compound: Put cold water into the tank till three-quarter with appropriate degreasing agent, then stirring, after, add sufficient water till working level, after, heat bath solution till operating temperature.
Control parameter: compound concentration: 40-80kg/1000l
Outlook: colorless to yellowish
Free acid: 20-40
Specific gravity: 1.08-1.18
Dipping time: 5-10minutes
Spray time: 90-120s
Test method: free acid:
1. pipet 10ml sample to conical beaker,
2. drip 3-4driping bromphenol indicator,
3. drip 0.1n NAOH into the solution, stop when yellow change to blue.
4. the consumption of NAOH is the free acid.
Density: test sample with gravimeter in 25 degree
Bath solution control: need to add6kg/1000l if free acid increase 1 point.
Could be drained in regular time
Reserve in dry shady and cool place to avoid sunshine.
Effluent disposal: Should observe chemical products disposal rules.
bath solution is acid which should be neutralized or disposed before drain.
Contact Person: kyjiang