Changzhou Junhe Technology Stock Co.,Ltd
Changzhou Junhe Technology Stock Co.,Ltd is a high-tech enterprise devoted to developing industrial fine chemicals,special equipment and services solution provider which was founded in Changzhou
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Black Oxide Zinc Aluminum Coating / Galvanic White Passivation Zinc Plating
Blackening Agent
JH-9201 is water based weak alkaline blackending agent, which is utilized of tempering heat provides black coating on the surface of the material. Environmental friendly, good black color effect, high gloss film
layer, excellent anti-rust function.
Characterstics
1. Adopt internal and external flim combined surface treatment,excellent anti-corrosion performance.
2. Excellent high temperature resistance and aging resistance.
3. The black film is quickly solidified,no sticky,high-gloss,and have no scraping phenomenon.
4. Environmental friendly,nontoxic and non volatility
Technical Parameter
| Item | JH-9201 | Test standard | |
| Apperance | Black liquid | Visual | |
| Density | 1.03～1.08 | GB/T21784.2 | |
| PH | 7～9 | GB/T9724 | |
| Corrosion resistance | Dip in 3%CuSO4 | No change after 30s,10min copper separate out | GB/T 15519 |
| Dip in 5%oxalic acid | No corrosion in 8min | ||
| Neutral salt spray test | No corrosion in 2 hours | GB/T 10125 | |
| Heat humidity test | No corrosion in 100 hours | GB/T 1740 | |
Materials proporation method
| Afterheat blackening agent is 100% concentrate original liquid,packed in plastic drum. Preparation blackening agent,first determine the total amount liquid,accommodated by the use of the method of concentration requirements,take about 1/10 blackening to the working tank, add water to the total amount,start the circulation pump and stirring device,make the blackening agent fully mix with water. |
Method of application
Suitable for ML35,35,35K, 45,1018,1022,20Cr, 35CrMo, 40Cr, 42CrMo, 40CrMn, 40CrMnMo, 30CrMnSiA, 40Cr2MoV and other materials of ordinary carbon steel,alloy steel,powder metallurgy parts and other steel parts;suitable for mesh belt furnace,pit furnace,multi-purpose furnace, box-type heat treatment furnace and other equipment.
Maintenance method
| 1.Regularly inspect PH value of blackening agent,add new solution in time,the pH was controlled at 7.0 - 9.0.
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2.Add blackening agent according to the production capacity,use after stirring,add a small amount each time,try to keep blackening agent system stable.
| 3.JH-9201 after long-term use,will have insoluble sediment at the bottom of the solution, it is recommended once every six months to a year to clean the tank. |
4.If the blackening agent tank aging serious,there is no improvement to add JH-9201 continuously,should replace the whole tank.
5.When stop production for a long time, it is recommended that the open loop device on a regular basis and add microbicides to prevent corruption
Product specifications and the period of validity
Specifications: 20kg / barrel
Validity: Under normal storage conditions of no less than 1 year.
