Junhetec JH-8249 Chrome-free Film Forming Agent for Aluminum Part,which is suitable for a variety of profiles of aluminum,magnesium alloy parts dipping, spraying passivation.It is colorless to pale yellow liquid. It has a certain stimulus, and water soluble.
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Brief Introduction |
JH-8249 is a liquid aluminum alloy passivating agent, can forming a colorless corrosion resistance passivating layer on the surface of aluminum parts by spraying or dipping processing ways. The product does not contain chromium, environmental friendly. The film is nature to light grey color, conversion coating had no significant effect on the binding force of the coating within 200 . |
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Preparation of tank liquid |
Add three-quarters of cold water into working tank, add 100kg JH-8249 for each 1000kg tank liquid. Add enough water to make the liquid level to the working level. |
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control parameter |
Appearance colorless to yellow liquid Total Acid 2-4 Working Liquid Density 1.0±0.05 Temperature Room Temperature-40 Processing time 60-120 second Proportion 1.0±0.05 |
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process flow |
Degreasing - washing - washing - film forming - washing - drying
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Preparation of tank liquid |
1)For 1000 liters tank liquid, for each additional free acidity, need to add 3.6kg JH-8249 2)When the tank liquid using time is too long, Al3 +and too much impurity ions,should consider replacing the working fluid |
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test method |
Density Take a certain amount of sample, keeping it at 25 , the density was measured with a hydrometer Free acid 1) pipette take 10 ml liquid into the Erlenmeyer flask 2) drops 3 to 4 drops of bromophenol blue indicator; 3) while swinging with 0.1N sodium hydroxide to color from yellow to blue; 4) the number of 0.1N sodium hydroxide used is free acidity.
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· Attention
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Wear protective glasses, rubber gloves and wear protective clothing during processing. Avoid direct contact with eyes,skin,clothing and equipment. Get medical attention if accident happen. |
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· packing |
25kg/ barrel |
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· guarantee period |
One year |
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wastewater treatment |
Tank liquid is acidic,the waste should send to waste water treatment statio. |
