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Preparation method of oil injection pump plunger surface phosphating liquid

A surface phosphating and preparation method technology, applied in the direction of metal material coating process, etc., can solve the problems of shortened product life, unusable, high phosphating temperature, etc., and achieve the effect of improving production efficiency, improving production efficiency, and low processing temperature

Inactive Publication Date: 2014-12-31
WUXI LUOSHE TECH VENTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of normal temperature phosphating solutions on the market, but there are generally characteristics of high phosphating temperature, long phosphating time, more phosphating precipitation, and poor corrosion resistance after phosphating
[0004] The main component of the existing room temperature phosphating solution is a compound of zinc dihydrogen phosphate and zinc nitrate, containing trace amounts of phosphoric acid and accelerators (mostly sodium nitrite). Due to the single variety of accelerators, it can also meet the needs of small and medium-sized enterprises in summer. The use requirements of enterprises, once in autumn, as the temperature continues to drop, it is difficult for small and medium-sized enterprises to use normally, and it will not be possible to use it without heating in winter
[0005] Many small and medium-sized enterprises generally have difficult heating conditions, do not have the steam heating pipelines of large enterprises, and generally have poor production batches and overall planning. Environment, or stop production in winter!
[0006] The front end of the plunger of the conventional diesel fuel injection pump has no surface treatment, and its fuel injection head usually cannot withstand high temperature for a long time and is easily corroded, which shortens the product life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for preparing a phosphating solution on the plunger surface of a fuel injection pump. The phosphating solution is composed of: 85% phosphoric acid 10g / L, 68% nitric acid 8g / L, zinc oxide 16g / L, nickel nitrate 6g / L, iron nitrate 2g / L, copper nitrate 2g / L, sodium citrate 3g / L, tartaric acid 7g / L, sodium fluoroborate 1g / L, sodium chlorate 1.5g / L, hydrogen peroxide 1.5ml / L, sodium carbonate 4g / L, balance Be water; Described phosphating solution preparation method is:

[0020] (1) Take an appropriate amount of water to adjust the zinc oxide into a paste;

[0021] (2) Take an appropriate amount of water again, add phosphoric acid and nitric acid to prepare the mixed solution, then add the paste zinc oxide in step (1), and then put it into the reaction kettle;

[0022] (3) Add nickel nitrate, iron nitrate, copper nitrate, sodium citrate, tartaric acid, sodium fluoroborate, sodium chlorate, hydrogen peroxide, and sodium carbonate into the reaction kettle in sequence,...

Embodiment 2

[0024] A method for preparing a phosphating solution on the plunger surface of a fuel injection pump. The phosphating solution is composed of: 85% phosphoric acid 12g / L, 68% nitric acid 6g / L, zinc oxide 18g / L, nickel nitrate 4g / L, iron nitrate 4g / L, copper nitrate 1g / L, sodium citrate 5g / L, tartaric acid 5g / L, sodium fluoroborate 2g / L, sodium chlorate 0.5g / L, hydrogen peroxide 2.5ml / L, sodium carbonate 3g / L, balance Be water; Described phosphating solution preparation method is:

[0025] (1) Take an appropriate amount of water to adjust the zinc oxide into a paste;

[0026] (2) Take an appropriate amount of water again, add phosphoric acid and nitric acid to prepare the mixed solution, then add the paste zinc oxide in step (1), and then put it into the reaction kettle;

[0027] (3) Add nickel nitrate, iron nitrate, copper nitrate, sodium citrate, tartaric acid, sodium fluoroborate, sodium chlorate, hydrogen peroxide, and sodium carbonate into the reaction kettle in sequence,...

Embodiment 3

[0029] A method for preparing a phosphating solution on the plunger surface of a fuel injection pump. The phosphating solution is composed of: 85% phosphoric acid 11g / L, 68% nitric acid 7g / L, zinc oxide 17g / L, nickel nitrate 5g / L, iron nitrate 3g / L, copper nitrate 1.5g / L, sodium citrate 4g / L, tartaric acid 6g / L, sodium fluoroborate 1.5g / L, sodium chlorate 1g / L, hydrogen peroxide 2ml / L, sodium carbonate 3.5g / L, The amount is water; the preparation method of the phosphating solution is:

[0030] (1) Take an appropriate amount of water to adjust the zinc oxide into a paste;

[0031] (2) Take an appropriate amount of water again, add phosphoric acid and nitric acid to prepare the mixed solution, then add the paste zinc oxide in step (1), and then put it into the reaction kettle;

[0032] (3) Add nickel nitrate, iron nitrate, copper nitrate, sodium citrate, tartaric acid, sodium fluoroborate, sodium chlorate, hydrogen peroxide, and sodium carbonate into the reaction kettle in seq...

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PUM

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Abstract

The invention discloses a preparation method of an oil injection pump plunger surface phosphating liquid. The preparation method of the phosphating liquid comprises the steps: (1) taking an appropriate amount of water to blend zinc oxide into a paste; (2) taking an appropriate amount of water again, adding phosphoric acid and nitric acid to obtain a mixed solution, adding the pasty zinc oxide of the step (1), and then putting into a reaction kettle; and (3) successively adding nickel nitrate, ferric nitrate, copper nitrate, sodium citrate, tartaric acid, sodium fluoroborate, sodium chlorate, hydrogen peroxide and sodium carbonate into the reaction kettle by a way of adding the next component after the former component is dissolved, and after all the components are dissolved, adjusting the pH to 2-3.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a method for preparing a phosphating solution on the plunger surface of a fuel injection pump. Background technique [0002] Since the civilization era of slash-and-burn farming, the use of tools and dependence on metals have never stopped. With the rapid development of modern industry, the output of steel has become an important symbol to measure the comprehensive strength of a country. The continuous doubling of steel production and the fact that a large amount of steel is corroded has plagued generations of producers and users. Because of this, many colleges, universities, scientific research personnel and engineering technicians have invested in the battle of steel anti-corrosion, and anti-corrosion processes and technologies such as pickling, phosphating, coating, and electroplating continue to emerge. [0003] Phosphating treatment is an indispensable treatment ...

Claims

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Application Information

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IPC IPC(8): C23C22/36
Inventor 高忠清
Owner WUXI LUOSHE TECH VENTURE
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