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Method for removing and preventing rust of inner cavity of component

A part and inner cavity technology, which is applied in the field of rust and rust prevention of the inner cavity of automobile cast iron or steel parts, can solve the problems of slow rust removal, poor rust removal effect, and cannot be applied to large-scale production of automobiles, and achieves the effect of saving costs.

Inactive Publication Date: 2011-05-11
CHINA FIRST AUTOMOBILE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] Application No. 03146767 is 'a neutral oil and rust remover'; application No. 95112070 is 'a kind of acid-free pickling solution' which not only has a slow derusting speed and poor derusting effect, but also contains a large amount of high-cost raw materials. Can not meet the characteristics of mass production of automobiles
[0015] Application No. 88100464 is 'A Low-Temperature Rapid Derusting Solution for Removing Oxidation Layers on Iron and Steel Surfaces'; Application No. 01131523 is 'A Rust-Removing and Antirust Solution for Treating Metal Surface Corrosion'; Application No. 02154470 'A formula for anti-rust and rust-removing liquid on steel surface'; application number 93102793 'a rust-resistant steel surface treatment liquid'; application number 88103516 'steel surface rust and anti-rust treatment agent'; application number 95110621 Patents such as 'a wide temperature phosphating solution for degreasing, rust removal and passivation' or containing volatile hydrochloric acid; or containing polluting ingredients restricted by environmental protection such as chromium trioxide or potassium dichromate, cannot be applied to automobiles in production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Firstly weigh 15 parts of phosphoric acid, 2 parts of citric acid, 0.2 parts of polyether 2010, 5 parts of urotropine, 1 part of industrial alcohol, 76.8 parts of After stirring tap water at room temperature, add 10ppm of p-nitrophenol indicator to make the color of the anti-rust liquid appear slightly blue liquid composition for derusting. In another reaction tank, weigh 1.5 parts of an organic acid with the molecular formula C6H18O24P6, 8 parts of triethanolamine, 5 parts of refined petroleum sodium sulfonate, and 40 parts of tap water, and heat and stir at 50°C for 10 minutes to form Relatively viscous liquid, gradually add 3 parts of fatty alcohol polyoxyethylene ether AEO3 to cause transparent viscous liquid, continue heating and stirring, add 0.1 part of polyethylene glycol 6000 distearate, 0.5 part of citric acid, 5 parts 1 part of triethanolamine, 0.5 part of industrial alcohol, 500ppm industrial Casson fungicide, add the remaining 36.9 parts of tap water, and f...

Embodiment 2

[0023] Corroded car hubs First weigh 10 parts of phosphoric acid, 2 parts of citric acid, 0.1 parts of polyether 2010, 3 parts of urotropine, 0.5 parts of industrial alcohol, and 68 parts of tap water in the reaction tank. After stirring under high pressure, add 10ppm p-nitrophenol indicator to make the anti-rust liquid appear slightly blue in the liquid composition for derusting. After the rust-removing car hub is washed with water, put it into another reaction tank and press In order, 4.5 parts of an organic acid with the molecular formula C6H18O24P6, 10 parts of triethanolamine, 12 parts of refined petroleum sodium sulfonate, and 40 parts of tap water were heated and stirred at 55°C for 10 minutes to form a relatively viscous liquid, and gradually added 4 parts of fatty alcohol polyoxyethylene ether AEO3 cause transparent viscous liquid, add 0.5 part of polyethylene glycol 6000 distearate, 3.5 parts of citric acid, 8 parts of triethanolamine, 1 part Industrial alcohol, 500p...

Embodiment 3

[0025]The rusted steering gear housing first weighs 20 parts of phosphoric acid, 5 parts of citric acid, 0.3 parts of polyether 2010, 5 parts of urotropine, -1 part of industrial alcohol, and 84 parts of After stirring the tap water at room temperature, add 10ppm of p-nitrophenol indicator to make the color of the anti-rust liquid appear a slight blue liquid composition for derusting. In a reaction tank, 2.5 parts of an organic acid with the molecular formula C6H18O24P6, 10 parts of triethanolamine, 10 parts of refined petroleum sodium sulfonate, and 40 parts of tap water were weighed in order, and heated and stirred at 60 ° C for 10 minutes to form a relatively viscous Thick liquid, gradually add 3 parts of fatty alcohol polyoxyethylene ether AEO3 to cause transparent viscous liquid, continue heating and stirring and add 0.3 part of polyethylene glycol 6000 distearate, 1 part of citric acid, 6 parts of Triethanolamine, 0.8 parts of industrial alcohol, 300ppm industrial Casson...

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PUM

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Abstract

The invention relates to a method for removing and preventing rust of an inner cavity of a component. The method is characterized by comprising the following steps: a rusted component is first derusted in a rust removing solution; after the derusted component is washed by water, the derusted component is placed in a transparency liquid in the other retort to be subjected to rust prevention treatment. The method can be used for rust removal and rust prevention for cast iron or steel components of automobile, does not contain volatile acids, heavy metal ions, sodium nitrite and other compositions, can be in assorted use under room temperature or a certain temperature by heating, and has the characteristics of stable process, non rust residue, long rust prevention period, low cost and non pollution. The method can be applied to rust removal and rust prevention for cast iron and steel material inner cavity components of automobile, and has significant economical benefit.

Description

Technical field: [0001] The invention relates to a method for rust removal and antirust in inner cavities of parts, which is applied to the field of rust removal and antirust in inner cavities of cast iron or steel parts of automobiles. technical background: [0002] According to information, the total amount of metal lost due to corrosion and rust in the world is more than 20% of the annual output, and the resulting economic loss is about 1 trillion US dollars. [0003] In 1999, "Guangming Daily" reported that my country's annual corrosion loss was 280 billion yuan, which shows that the loss caused by metal corrosion is huge. [0004] When the metal is in contact with the surrounding medium, the damage caused by chemical and electrochemical actions is called metal corrosion, and the presence of water and the formation of rust is called rust. Except for a few metals, such as gold, platinum, and titanium, all metals have a tendency to transform into ions, which means that me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/02C23C22/62
Inventor 张克金张静刘国军王丹张苡铭
Owner CHINA FIRST AUTOMOBILE