CN103276374A

CN103276374A - Chemical nickel process

Info

Publication number: CN103276374A
Application number: CN201310211614XA
Authority: CN
Inventors: 雷学文
Original assignee: YANKANG AUTO PARTS RUGAO Co Ltd
Current assignee: YANKANG AUTO PARTS RUGAO Co Ltd
Priority date: 2013-05-30
Filing date: 2013-05-30
Publication date: 2013-09-04

Abstract

The invention discloses a chemical nickel process. The chemical nickel process is characterized in that a specific chemical nickel agent is prepared; and after the preparation of chemical nickel agent, the pH value of washing water is neutralized in washing process, so that the weak acidity of pH6 is kept. In the manner, a proper chemical nickel agent is utilized; the production capacity and the quality of the product are improved; the service time of the washing water is prolonged after the pH value of the washing water is neutralized; the water exchange frequency is reduced; the production capacity is improved; and the treatment cost of wastewater is reduced.

Description

Chemical nickel technology

Technical field

The present invention relates to a kind of chemical nickel technology, relate in particular to a kind of production capacity height, the chemical nickel technology that cost for wastewater treatment is low.

Background technology

When automobile exterior spare took out in nickel plating later, the surface can have the medicament of nickel plating, therefore, need wash exterior trimming parts.Because the chemical nickel medicament of preparation is alkalescence, pH value is 8.4-8.8, and wherein a kind of starting material Trisodium Citrate is produced by zymotechnique, is easy to bring out mouldy.After washing after a while, the water of washing pool has just become weakly alkaline like this, and has Trisodium Citrate to exist, and wash water and can be easy to muddiness this moment, and the washing cell wall can produce a lot of oyster white flosss when serious, and swims in the water.The general continuous production of tradition washing process will be changed water in two days, otherwise the product of producing can produce a lot of pits and burr, and good article rate is not high.Change in the water process and can not go into operation, wasted production capacity, and increased cost for wastewater treatment.

Summary of the invention

Technical problem to be solved by this invention provides a kind of production capacity height, chemical nickel washing process that cost for wastewater treatment is low.

For solving the problems of the technologies described above, the technical solution adopted in the present invention is:

A kind of chemical nickel technology comprises following steps:

A. chemical nickel pre-treatment is carried out hot water wash with plastic cement automobile exterior spare, and the back dispergation is washed in coarse surface, reduction, hydrochloric acid preimpregnation, the activation of palladium water then afterwards again;

B. chemical nickel plating disposes chemical nickel solution, carries out chemical nickel plating;

C. the chemical nickel after washing to the washing of the exterior trimming parts after the chemical nickel, changes water during washing bath water muddiness;

It is characterized in that:

The prescription of the employed chemical nickel solution of described step b chemical nickel plating operation is: with water as solvent, wherein single nickel salt: 23-27g/l, sodium hypophosphite: 23-27g/l, Trisodium Citrate: 38-42g/l, ammonium chloride: 33-37 g/l, and transfer to pH value 8.4-8.8 with ammoniacal liquor;

In the described step c chemical nickel after washing operation, water lotion is neutralized, make pH value remain on 6 slightly acidic.

Adopt such technology, by disposing specific chemical nickel medicament, increase production capacity, and in when the chemical nickel after washing and the pH value of washing water, make it keep the slightly acidic of PH6, so just avoided occurring the floss bacterium and reduced quality product, simultaneously, adopted in such a way, avoided changing frequently water, change a water from two days and change 20 days into and change water one time, improved production capacity, reduced the cost of wastewater treatment simultaneously.

Embodiment

Chemical nickel technology of the present invention comprises chemical nickel pre-treatment, chemical nickel plating and three steps of chemical nickel after washing.

Step a: during the chemical nickel pre-treatment, because automobile exterior spare is plastic cement, direct chemical nickel plating needs handle the surface of exterior trimming parts earlier in the above, makes the exterior trimming parts surface be fit to nickel plating.At first automobile exterior spare is carried out hot water wash with vapor recovery water, with cold water secondary water washing and cooling, then alligatoring is carried out on the surface of exterior trimming parts again.Reduce after the washing, washing back hydrochloric acid preimpregnation then is again with the activation of palladium water again.Dispergation is carried out in washing then again, and the dispergation after washing is finished the chemical nickel plating preorder and prepared.

Step b: during chemical nickel plating, configuration chemical nickel solution, as solvent, solute is: single nickel salt with water: 23-27g/l, sodium hypophosphite: 23-27g/l, Trisodium Citrate: 38-42g/l, ammonium chloride: 33-37 g/l, and transfer to pH value 8.4-8.8 with ammoniacal liquor.Chemical nickel solution by configuration carries out chemical nickel plating to automobile exterior spare.

Step c: during the nickel plating after washing, because the pH value of the solution of chemical nickel configuration is 8.4-8.8, and Trisodium Citrate wherein produces by zymotechnique, is easy to bring out mouldy.Therefore, when washing, adding weak acid in washing water, will to wash the PH of water be 6, like this in water washing process, because the chemical nickel solution of taking out of on the exterior trimming parts is alkaline, therefore the pH value of washing water raises gradually, needs per two hours of staff that the pH value of washing water is once tested, and adds weak acid then and will wash the pH value of water and be adjusted to 6.When the water of washing bath becomes muddiness, carry out washing bath and change water.

Adopt in such a way, by disposing specific chemical nickel solution, improved production capacity and the quality of product.Simultaneously, by adding the neutralize mode of pH value of washing trough inner water of weak acid, avoided the too early muddiness of washing water, avoided Trisodium Citrate mouldy simultaneously, exchange water cycle became change in present 20 days one from two days original transformations like this, reduce the frequency of changing water, improved production capacity, reduced the processing cost of waste water simultaneously.

Claims

1. chemical nickel technology comprises following steps:

The chemical nickel pre-treatment is carried out hot water wash with plastic cement automobile exterior spare, and the back dispergation is washed in coarse surface, reduction, hydrochloric acid preimpregnation, the activation of palladium water then afterwards again;

Chemical nickel plating, configuration chemical nickel solution carries out chemical nickel plating;

The chemical nickel after washing, to the washing of the exterior trimming parts after the chemical nickel, washing bath water changes water when muddy;

It is characterized in that:

The prescription of the employed chemical nickel solution of described step b chemical nickel plating operation is: with water as solvent, solute is: single nickel salt: 23-27g/l, sodium hypophosphite: 23-27g/l, Trisodium Citrate: 38-42g/l, ammonium chloride: 33-37 g/l, and transfer to pH value 8.4-8.8 with ammoniacal liquor;