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 PRODUCTS

 High P-Ratio Parkerizing Agent DH-3250

Parkerizing Agent DH-180(to be sprayed)

Parkerizing Agent DH-190(to be pickled in)

Parkerizing Agent DH-L4330

Parkerizing Agent DH-J4400 Used in Wire-Drawing

USE DH-3237 IRON-STEEL RUST REMOVER

DH-60L Additive to Iron-Steel Rust Remover

DH-201 Moderate-Temperature High-Effective Degreasing Agent

DH-88 Colloid Titanium Surface Adjuster

 
PRODUCTS  

USE DH-3237 IRON-STEEL RUST REMOVER

 1)  General introduction

DH-3237 is a rust remover for iron and steel pieces. It has phosphoric acid as its main component, comprising also complexes of other organic acids and non-organic acids as well as some kinds of surface activators.  It being used to remove rust before the workpieces are parkerized can bring about the two-way effect --- not only the results of acid pickling shown on he surface more satisfactory, but the surface is also no longer so liable to get rusty again(than if hydrochloric acid is used instead). So it is helpful to produce a more lasting parkerizing film.

DH-3237 iron-steel rust remover being used in pickling workpieces with folds, dog-ears and welding seams can prevent rusting again of these hidden parts, so that the quality of later processes can be guaranteed.

2)  Characteristics of the product

    (a) As the rust remover consists of various surface activators, its actions of permeating, dispersing, moistening and carrying-away can speed up the clearance of rusty crusts and other impurities attached to the surface of the steel material, and improve the results of pickling to get the material ready for successive treatments.

    (b) The compounds in this dust remover can get into drastic complexing with Fe3+, and thus quicken the process of rust removing.

    (c) This dust remover is nonpoisonous, very steady in property, without any peculiar smell, doing no harm to users and giving no acid mists. It has not any erosive effects to the electric and mechanic installations and the workshop itself.

3)  Main technical indexes

(a)  Appearance --- colorless or light yellow.

(b)  Physical-chemical properties ---

Specific gravity: 1.465 – 1.510

Solubility: easily dissolved in water.

(c)  Density of the liquid to be used ---

   1:2/3(to be diluted with water 2 or 3 times the quantity of the original liquid.

4)  The tank(1000L) --- in case the liquid is diluted with water twice the quantity of the  agent.

(a)  Let the tank contain at first 50% of the water.

(b)  Pour in DH-3237 dust remover about 500kg, and stir the mixer.

(c)  Add some more water(total amount of the mixer1000L), stir well.

(d)  Get 2ml of the mixer out to testify the acidity.

5)  Treatment conditions

(a)  The liquid is always valid as long as its general acidity keeps between 50-70pt, so there is no need to make tests repeatedly.

(b)  Free acidity need not be tested.

(c)  Temperature and manner of application ---

Soaking at normal temperature (RT – 50°C)

(d)  Time duration ---

For treatment of surface rust: 5 to 10 minutes.

For treatment of rusty crusts: 10 to 20 minutes.

6)  Supplement and adjustment --- in case 1000L liquid is used.

As the density of the liquid gets lower during the treating of the rusty material, the changing density should be tested from time to time, and extra agent should be supplied to maintain a normal effective rate. Generally speaking, adding every 4kg of the agent will get the general acidity to increase by 1 pt.

7)  Testing methods ---

General acidity: Transfer 2 ml of the treating liquid with a suction pipet into a 250ml beaker, add 50ml of distilled water, and then 5 or 6 drops of phenolphthalin. Titrate the mixer with NaOH of 0.1N. When the mixer changes from colorless to pink, the number of ml of NaOH used will be the pt value of the general acidity.

8)  Quality of the container ---

The pickling tank should be made of stainless steel or carbon steel lined with glass fiber reinforced plastic. The heat exchanger, the sprayer nozzle, the piping and the pump should be stainless steel parts.

9) Points for attention --- 

(a)  This rust remover has a lower solubility of iron, so when the density of Fe2+ reaches 65-70g/L, the liquid should be drained off.

(b)  The best way to get rid of deposits in the tank is to pump the whole of the liquid into a clarifying tower or clarifying basin, and then return the clear liquid to the tank.

    10) Package , storage and transportation ---

(a)  Specifications: This product is a light yellow liquid, containing no impurities and insoluble substances. It can be stored for long periods without deteriorating.

(b)  Storage, transportation and package: The product is not an inflammable or explosive substance, neither is it poisonous. It does not demand any special storage and transportation conditions. The normal package is 30kg polythene plastic containers. Other kinds of package are available on customers’ requirements.

   
 
 
 
 

ADD:1 Baofeng Road,JingHe Industrial Areas, HeJian city, Hebei. TEL0086-317-3698166  FAX:0086-317-3698168 Mobile:(0086)13803256193

Postcode:062451  General:LI BAOQI  E-mial: libaoqi8899@163.com

关键词:脱脂剂  除油剂  酸雾抑制剂  快速除锈剂  表调剂  磷化剂  钝化剂  氧化剂  防锈油