Sericin rare-earth metal surface treatment agent

A technology of surface treatment agent and rare earth metal, which is applied in the coating process of metal materials, etc., can solve problems such as localized corrosion and increased corrosion current density, and achieve the effect of slowing down electrode reaction and improving tensile strength and thermal stability

Inactive Publication Date: 2015-08-05
BENGBU TIMES ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount is insufficient, a complete oxide film cannot be formed, and the corrosion current density increases on the small metal surface that is not covered, which is likely to cause severe local corrosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A kind of sericin rare earth metal surface treatment agent, it is made up of the raw material of following weight part:

[0018] Polyglutamic acid 0.2, polyvinyl alcohol 15, sericin 4, boric acid 0.07, yttrium nitrate hexahydrate 0.05, silane coupling agent KH-550 0.4, water 200, diazolidinyl urea 0.3, sodium pyrophosphate 2, boric acid amino Triethyl ester 2, hexamethylphosphoramide 0.3, octoxynol 1.

[0019] A preparation method of sericin rare earth metal surface treatment agent, comprising the following steps:

[0020] (1) Take sericin, add 40% of the above water weight, stir evenly, add silane coupling agent KH-550, yttrium nitrate hexahydrate, stir and disperse at 600 rpm for 10 minutes to obtain silane liquid;

[0021] (2) Mix polyglutamic acid and bis-imidazolidinyl urea, add 50% of the remaining water weight, stir and mix for 6-10 minutes to obtain antiseptic solution;

[0022] (3) Take 20% of the weight of the above polyvinyl alcohol, add sodium pyrophosphat...

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PUM

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Abstract

The invention discloses a sericin rare-earth metal surface treatment agent which is composed of the following raw materials, by weight, 0.1-0.2 part of polyglutamic acid, 10-15 parts of polyvinyl alcohol, 4-6 parts of sericin, 0.07-0.1 part of boric acid, 0.05-0.1 part of yttrium nitrate hexahydrate, 0.4-1 part of a silane coupling agent KH-550, 150-200 parts of water, 0.1-0.3 part of diazolidinyl urea, 1-2 parts of sodium acid pyrophosphate, 2-4 parts of triethanolamine borate, 0.2-0.3 part of hexamethylphosphoramide and 1-2 parts of octoxinol. After hydrolysis of silane, an adsorption type film can be formed on metal surface so as to isolate water molecules and oxygen molecules in the environment, thus having a protective effect. Through boric acid modification, tensile strength and heat stability of blend films can be enhanced. The added rare earth metal ions and OH- generated by oxygen absorption corrosion of the metal substrate surface undergo complexing to generate insoluble complexes. The complexes can alleviate the electrode reaction of corrosion.

Description

technical field [0001] The invention mainly relates to the field of metal surface treatment agents, in particular to a sericin rare earth metal surface treatment agent. Background technique [0002] Metal surface treatment agent refers to the general term for various chemical agents for metal surface treatment. Metal surface treatment includes degreasing, rust removal, phosphating, antirust and other substrate pretreatments, which are prepared for metal coating technology and metal protection technology. The quality of substrate pretreatment has a great influence on subsequent coating preparation and metal use. The water-soluble rust inhibitor can be dissolved in water to form an aqueous solution, and the metal can prevent corrosion and rust after being treated with this aqueous solution. Their antirust effect can be divided into three categories. [0003] ①The metal and the antirust agent form an insoluble and dense oxide film, thus preventing the anodic dissolution o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/07
Inventor 朱兴堂朱亮亮陈军彦
Owner BENGBU TIMES ELECTRONICS
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