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Trivalent Chromium Passivator TRC

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Auxiliaries for Anodizing

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Product Details

Name     Type

Oxidation Additive

Model/Specification

TRC

SpecialProperty

Used for aluminum, trivalent chromium passivation forms a transparent, light-colored coating. Corrosion resistance is better than hexavalent chromium passivation processes. It can also be used for aluminum alloys and aluminum die-cast parts. It is easy to operate in immersion, spraying, and manual wiping processes. It can also be used as a pretreatment for painting, powder coating, and adhesive treatment.

Trivalent chromium passivation agent for aluminum and its alloysTRCDilute with deionized water to prepare the bath. Please thoroughly clean the tank before preparing the bath. For new tanks or new production lines, use10%sulfuric acid solution for cleaning, then rinse with water, and then add the required amount of deionized water, stir evenly, measure itsTRCvalue, and adjustpHthe value topH.3.9Usage Conditions

Concentration

 

 

 

Spray  Immersion

ml  L

(100-500  )

TRC

250(/Temperature℃(/Temperature(30-40

200(/TemperatureValue100-500(/Temperature(30-40

3.7-3.95) (  Immersion

40Use 5%Use(30-40

pHsulfuric acid solution or

3.9Value1%sodium hydroxide solution to slowly adjustTimeminutes(30-60seconds(30-40

As a pretreatment for coating

40Use

1(1-3As a corrosion-resistant treatment(1-4(30-40(2-6

2(1-3Spraying Pressure(1-3(30-40:

30Use

2(1-31bar (0.5-1.5bar)(1-3(30-40(2-6

4(1-3Stirring(1-3(30-40:

 

 

Not necessaryTank Material

Stainless steel or steel with acid and fluoride resistant lining

 

FiltrationTank Material

It is necessary to use

 

At leastTank Material

circulations per hour

 

HeatingTank Material

It is necessary to use, heating equipment must be acid and fluoride resistantValueExhaust Device2For the health of workers, it is recommended to use(30-40

 

Standard immersion pretreatment processTank Material

Aluminum alloy

 

Silicon contentTank Material

<1%)

 

 

 

: Weak alkaline degreasingTank Material

→ValueAlkaline etchingRemove oxidation skin>1%)DecontaminationStandard spraying pretreatment process: Acid degreasingDecontaminationThe film after treatment can immediately proceed to the next coating process. If the passivated workpiece is coated after

→ValueAlkaline etchinghours, the effect will be better. The drying temperature should not exceed>1%)Decontamination℃.

 

Maintenance:

TRCAccording to the analysis method and24regularly adjust the solution to the optimal concentration and65value.

 

Consumption:The consumption is mostly due to carry-out losses. For every processedpHsquare meterpHof product

 

including carry-out amount, need to add1concentrate.Testing:ValueBefore conducting neutral salt spray testing on the passivated workpiece,(30-40it must be placed at room temperature for15-25(hours.

 

Environmental Protection:Used,必须在室温下放置24小时。

 

环保：使用过的TRCThe solution and its wash water must be treated and discharged according to national and local regulations. The general process is to neutralize with lime milk untilpHthe value reaches9-10and then precipitate and filter for discharge.TRCThe concentrated solution is harmful to water, with a water hazard level of1levelValueself-assessment(30-40Usage Conditions

packagingand storage

25kilograms/barrels, in liquid form, stored ina cool, dry storage room, and direct sunlight is strictly prohibited.Direct sunlightand high temperatures are to be avoided, and must be sealed properly after use.

Precautions
  1. There may be some precipitate in the product inventory, but it does not affect its quality and performance.Usage Conditions
  2. BeforeTRCpassivation, the surface of the workpiece must be clean and free of oxide scale.Usage Conditions
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