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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  

 

 

Parkerizing Agent DH-180(to be sprayed)

1.  General introduction

    DH-180 is a fast parkerizing agent with a low-temperature and low-dregs character. It forms a thin yet solid parkerizing film on the surface of the iron-steel work pieces through chemical treatment. The parkerizing film can remarkably improve the attachment of paint and the resistance against erosion. The finished surface will be much more shiny and refined.

The agent consists of components in 4 packets:
DH-180A(for preparing the tank)
DH-180B(for reinforcing)
Neutralizer NT-525
Activator AC-1

2.  Technical procedures

Degreasing --- cleaning in water --- cleaning in water --- (surface adjustment) --- parkerizing --- cleaning in water ---cleaning in water --- cleaning in pure water

Degreasing ---cleaning in water --- acid pickling --- cleaning in water --- (surface adjustment and neutralizing --- parkerizing --- cleaning in water --- cleaning in pure water

Degreassing and rust removing --- cleaning in water --- cleaning in water --- surface adjustment --- parkerizing --- cleaning in water(hot water)

Choose one of the above procedures. When it has been gone through, put the work piece into an oven to be dried.

3.  Preparing the parkerizing tank(1000L)

a)  Let the tank contain water up to 80% of the total volume.

b)  Put in 30kg of DH-180A, and stir well.

c)  Take 2.67kg of NT-525 and dilute it with 20L of water, and then add them into the tank.

d)  Pour in more water to make up the total volume 1000L.

e)  Heat the liquid to the temperature required, and then test the acidity.

f)   Add 0.38kg of activator and stir well before treating the work pieces.

4.  Treating conditios

General acidity --- 14-15pt
Free acidity --- 0.5-0.8pt
  Density of the activator --- 1.5-2.5pt
  Temperature --- 45-55°C
  Time duration --- 2-3 minutes

5.  Supplement and adjustment(1000L)

   As the density keeps changing during the treating process, density tests should be made at regular intervals to maintain density within the required range. Every 1.74kg of DH-180B added may increase the general acidity by 1 pt.

   But in case of overflow causing a loss of the treating liquid, water and DH-180A must be added to     

adjust the general acidity. Every 2.07kg of DH-180A will raise the general acidity by 1pt.

   Free acidity may be lowered by neutralizer --- On condition that only small pieces or no pieces are being treated and the parkerizing liquid is as hot as over 45°C, or that the DH-180B has been put in too much, then free acidity will go up over 1.2pt. In that case, neutralizer is needed for regulating the liquid. Every 160g of neutralizer NT-525 can lower the free acidity by 1pt.

   Activator --- Activator in the liquid is consuming even while no work pieces are being treated. So its density should be tested in the process of treatment and extra activator be added to maintain the required density. Every 150g of activator AC1 can increase the acidity by 1pt.

6.  Testing methods

   General acidity --- Transfer 10ml of the liquid with a suction pipet into a 250ml beaker and add 5 or 6 drops of phenolphthalein. Titrate with NaOH(0.1N). When the color turns from colorless to pink, it is the end of the titration. The number of ml used is the value of general acidity.

   Free acidity --- Transfer 10ml of the liquid with a suction pipet into a 250ml beaker and add 4 or 5 drops of bromophenol blue indicator. Titrate with NaOH(0.1N). When the color turns from yellow to blue or purple, it is the end of the titration. The number of ml used is the value of free acidity.

   Density of activator --- Fill a fermentation tube with the treating liquid. Add 2-5g of sulphanilamide. Block the tube, turn it upside down and shake it vertically. Then let it stand still for 2 minutes. The volume of the gas produced as indicated by the scales will be the density of the activator. One scale means one pt.

7. Materials of the apparatuses

   The parkerizing tank should be made of stainless steel or carbon steel. The heat exchnager, the sprayer nozzle, the piping and the pump should be made of stainless steel.

8. Equipment maintenance

   The best way to rid the tank of deposits is to pump the whole lot of the liquid into a deposit tower or deposit pool, and then return the clean liquid to the parkerizing tank.

 
 
 
 
 

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