name said

oxidation Auxiliary Agent

model/specification

TRC

characteristics

Trivalent chromium passivation used for aluminum forms a transparent, light-colored coating. Corrosion resistance is better than hexavalent chromium passivation process. It can also be used for aluminum alloys and aluminum die castings. Easy to operate in dipping, spraying and manual wiping processes. It can also be used for pretreatment of painting, powder spraying and gluing.

TRC, the trivalent chromium passivator for aluminum and its alloys, is diluted with deionized water to build a bath. Before building a bath, please thoroughly clean the tank. For new tanks or new production lines, clean it with 10% sulfuric acid solution, and then clean it with water. Then add measured deionized water required for TRC, stir evenly, measure its pH, and adjust the pH to 3.9.

conditions of use

Spray pressure:

1bar (0.5-1.5bar)

Stirring:

no need

Tank material:

Stainless steel or steel with acid and fluorine resistant linings

Filter:

Necessary to use (at least 2 cycles per hour)

Heating:

If necessary, heating equipment must be acid and fluorine resistant

Exhaust device:

For the health of workers, it is recommended to use

Standard impregnation pretreatment process:

Aluminum alloy (silicon content

Aluminum alloy (silicon content>1%): weakly alkaline degreasing → decontamination

Standard spray pretreatment process: acidic degreasing

The TRC treated film can be immediately subjected to the next coating process after drying. If the passivated workpiece is left for 24 hours and then coated, the effect will be better. The drying temperature cannot be higher than 65℃.

Maintenance: Regularly adjust the solution to the optimal concentration and pH value according to the analytical method and pH meter.

Consumption: Most of the consumption is caused by losses. For every 1 square meter of product processed (including carry-out volume), 15-25 ml of concentrated solution need to be added.

Test: The passivated workpiece must be placed at room temperature for 24 hours before undergoing neutral salt spray testing.

Environmental protection: Used TRC solution and its washing water must be treated and discharged in accordance with national and local regulations. The general process is to neutralize it with lime milk until the pH value reaches 9-10, and then precipitate, filter and discharge. TRC concentrate is hazardous to water and has a water hazard level 1 (self-assessment).

package and storage

25 kg/barrel, liquid, stored in a cool and dry warehouse. Direct sunlight is strictly prohibited. High temperatures and high temperatures must be closed and sealed after use.

precautions

• In product inventory, some sediments will occur, but it will not affect its quality and performance.
• Before TRC passivation, the surface of the workpiece must be clean and free of oxide scales.