RC-Bd2 Zinc Stripping for Aluminum Alloy (Make-up)

INTRODUCTION

RC-BD2 does not contain nitric acid, which is used to remove the first zinc coating in twice of the zincate processes.

DETERMINATION OF DEZINCING AGENT

--Reagent

0.1N ferrous ammonium acid

25% (v/v) acid

0.1N potassium permanganate

--Steps

1. Pipette a 1.0 ml of solution into a conical flask.

2. Add 50 ml of pure water.

3. Add 20 ml of 0.1N ferrous ammonium acid and standing for 30 seconds.

4. Add 5 ml 25% (v/v) acid.

5. Titrate with 0.1N potassium permanganate to a purple end point.

6. Record titration milliliter number as ‘ X ’.

7. Repeat the steps above, but replace 1.0 ml of solution with 5 ml of pure water then record titration milliliter as ‘ Y ’.

BD2 aluminum alloy dezincing replenishment containing (ml/l) = 80.26 × ( Y-X )

DETERMINATION OF SULPHURIC ACID

--Reagent

1.0N sodium hydroxide

0.1% methyl orange indicator

--Steps

1. Pipette a 5 ml BD2 solution into a Erlenmeyer flask.

2. Add 75 ml of pure water.

3. Add 5 drops of methyl orange indicator.

4. Titrate with 1.0N sodium hydroxide to a light yellow/light green end point.

Sulfuric acid content (volume percentage) = 3.44 × titration milliliters ÷ 5 ml

Note: it is suggested that redo make-up when the zinc content of the solution exceeds 2.25 g/l.

SAFETY AND ENVIRONMENTAL

A Material Safety Data Sheet (MSDS) includes product safety instructions and environmental protection instructions. Read and review the MSDS for appropriate health and safety warning before use.

WARRANTY

1. We provide guarantee for product quality under the valid law.

2. The quality of the product after reprocessing or repackaging by customer is not included in the guarantee.

3. Please feel free to contact us if you have any questions or issues about the products, we are ready to answer at any time.

COLOR & PACKAGING

RC-BD2 zinc stripping for aluminum alloy (make-up) is a colorless liquid with plastic barrel packaging. The packaging specification is 25 kg/pcs.

RC-BD2 zinc stripping for aluminum alloy (replenisher) is a colorless liquid with plastic barrel packaging. The packaging specification is 25 kg/pcs.

?IMPORTANT NOTICE REGARDING THIS INSTRUCTION BOOK

The product information and recommendations contained in this document are based on our experimental theory and data. Due to the particularity of the surface processing, further as the actual use of our products by others is beyond our control, NO GUARANTEE of any kind is made as to the effects of such use, and NO RESPONSIBLE for any consequences. Also, all the information in this document cannot be used as evidence of copyright infringement.