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 ℃

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.

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

process flow

Degreasing - washing - washing - film forming - washing - drying

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

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

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

wastewater treatment

Tank liquid is acidic,the waste should send to waste water treatment statio.