Manufacturer supplies aluminum trivalent chromium sealant | 75511 aluminum alloy anti-salt spray sealer

Aluminum alloy anti-salt spray sealant
1. Introduction
The green acidic liquid has good anti-rust and anti-salt spray effects on aluminum materials, aluminum alloys, electroplating and other workpieces, reaching the domestic level. foreign advanced level. The surface of the workpiece treated with this product will form a light-colored protective film. Pure aluminum is extremely resistant to salt spray. This product contains trivalent chromium and has a specific gravity value at room temperature
2. Operation skills
. Preparation Tank
Dilute with pure water
Concentration/
Value. (Adjust the value with % and % sodium hydroxide)
. Treatment temperature, time and use (recommended for low silicon aluminum Alloy)
Concentration
Treatment temperature
Treatment time
Application
/
~℃
Minutes
Suitable for coating base
/> Minutes
For corrosion resistance treatment
Room temperature~℃
.minutes
Pre-spraying treatment
Minutes
Salt spray resistance treatment
< br/> .Spray pressure
.Filtration is necessary, preferably two cycles per hour.
3. Recommended treatment process
.Aluminum alloy (silicon content %)
① Degreasing () washing, washing, passivation, washing and drying
4. Tank maintenance
Maintenance< br/> Regularly adjust the solution concentration and value according to the analysis method.
Consumption Consumption is almost solely based on the amount taken out. For every square meter of product processed, additional concentrate is required.
5. Solution analysis
. Take samples in a uniformly mixed state and cool to room temperature naturally. If it is turbid, let it stand and then decant or filter.
.Titration method
.Reagents sodium hydroxide, % hydrogen peroxide, potassium iodide, .standard solution, % starch solution
. Steps: Transfer the passivation tank liquid into an Erlenmeyer flask, add % sodium hydroxide solution, add hydrogen peroxide, stir, add hydrogen peroxide again, stir at room temperature, and then boil the solution (the solution in the Erlenmeyer flask should not be lower than, If it is close during the boiling process, stop heating, cover the mouth of the conical flask with a watch glass during the boiling process) to remove excess hydrogen peroxide, cool the solution to room temperature, add deionized water to the scale of the conical flask, and use Filter with precision filter paper, clean the filter with deionized water, the filtered solution must be clear and free of precipitates, then add % acidification to the filtrate (the color of the solution changes from yellow to orange), then add potassium iodide, and titrate until light. If it turns yellow, add a few drops of starch solution and continue the titration until the blue color disappears.
Conversion
Number of milliliters consumed for content
.Atomic absorption spectrometry
Take the solution into a volumetric flask, add the solution, mix evenly, let it sit, add deionized water to the mark , shake well, and measure at. Use standard chromium salt solution to measure and draw a standard curve.
6. Equipment
Stainless steel tank. The best material is stainless steel.
7. Safety measures
This product is an acidic liquid. Avoid direct contact. Wear rubber gloves and appropriate protective clothing when handling.
Rinse immediately after handling.
In case of contact with skin or eyes, rinse with plenty of water.
8. Packaging
/Barrel
Supplier Foshan Nanhai District Taiyang Electroplating Anticorrosive Raw Materials Business Department
Technical consultation phone number
,
Contact person Xu Sheng< br/>