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Zinc series anticorrosive electrolytic phosphating liquid and preparing method thereof

An electrolytic phosphating solution, zinc-based technology, applied in phosphating and other directions, can solve problems such as not meeting environmental protection requirements, unfavorable environmental protection, and restricting application fields, and achieve the effects of inhibiting electrochemical corrosion, fast and efficient surface, and reducing costs.

Active Publication Date: 2019-06-07
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese invention patent application with the application number CN201511009866.X discloses a formula for forming a high-corrosion-resistant phosphating film at room temperature. A large amount of toxic zinc nitrate is added to the formula, which is not conducive to environmental protection, and is harmful to human health. harmful to health
The Chinese invention patent application with the application number CN201410522325.6 discloses a normal temperature phosphating solution and its preparation method. Toxic reagents such as sodium fluoride and sodium m-nitrobenzenesulfonate are added to the application formula, which does not meet the environmental protection requirements. At the same time, its field of application is limited

Method used

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  • Zinc series anticorrosive electrolytic phosphating liquid and preparing method thereof
  • Zinc series anticorrosive electrolytic phosphating liquid and preparing method thereof
  • Zinc series anticorrosive electrolytic phosphating liquid and preparing method thereof

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Embodiment 1

[0040] A zinc-based anti-corrosion electrolytic phosphating solution, its raw material formula components consist of:

[0041] Zinc oxide: 3g

[0042] Phosphoric acid: 30g

[0043] Functionalized Graphene Oxide (FGO): 0.05g

[0044] Sodium hydroxide: 7g

[0045] Solvent water: 1L

[0046] A preparation method of zinc-based anticorrosion electrolytic phosphating solution, comprising the steps of:

[0047] 1) Functional modification of graphene oxide: disperse 0.2 g of graphene oxide in 200 g of absolute ethanol, put the resulting graphene oxide dispersion into the reactor with 2 g of vinyltriethoxysilane and heat up to 70 ℃ reflux reaction for 8 hours, after suction filtration and washing, disperse the obtained modified graphene oxide in 50g deionized water to obtain a dispersion; Trimethylammonium chloride (DMC), 0.5g ammonium persulfate, and 300g deionized water were put into the reaction kettle, and the temperature was raised to 80°C for 2 hours, and the obtained function...

Embodiment 2

[0059] A zinc-based anti-corrosion electrolytic phosphating solution, its raw material formula components consist of:

[0060] Zinc sulfide: 10g

[0061] Potassium dihydrogen phosphate: 30g

[0062] Functionalized Graphene Oxide (FGO): 0.04g

[0063] Sodium carbonate: 10g

[0064] Solvent water: 1L

[0065] A preparation method of zinc-based anticorrosion electrolytic phosphating solution, comprising the steps of:

[0066] 1) Functional modification of graphene oxide: Disperse 0.3g of graphene oxide in 300g of absolute ethanol, put the obtained graphene oxide dispersion into the reactor together with 3g of vinyltrimethoxysilane and raise the temperature to 60°C Reflux reaction for 6 hours, after suction filtration and washing, disperse the obtained modified graphene oxide in 50g deionized water to obtain a dispersion; the obtained modified graphene oxide water dispersion, 10g dimethyl diallyl chloride Ammonium chloride (DMDDAAC), 0.5g potassium persulfate, and 300g deioni...

Embodiment 3

[0071] A zinc-based anti-corrosion electrolytic phosphating solution, its raw material formula components consist of:

[0072] Zinc chloride: 10g

[0073] Sodium phosphate: 40g

[0074] Functionalized Graphene Oxide (FGO): 0.03g

[0075] Sodium bicarbonate: 10g

[0076] Solvent water: 1L

[0077] A preparation method of zinc-based anticorrosion electrolytic phosphating solution, comprising the steps of:

[0078] 1) Functional modification of graphene oxide: disperse 0.4g of graphene oxide in 300g of absolute ethanol, mix the obtained graphene oxide dispersion with 2g of vinyltrimethoxysilane, 2g of vinyltriethoxy Put the silane into the reactor together and raise the temperature to 80°C for reflux reaction for 5 hours. After suction filtration and washing, disperse the obtained modified graphene oxide in 50g deionized water to obtain a dispersion; the obtained modified graphene oxide aqueous dispersion, 5g of acryloyloxyethyltrimethylammonium chloride (DAC), 1g of azobisi...

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Abstract

The invention discloses zinc series anticorrosive electrolytic phosphating liquid and a preparing method thereof. The liquid comprises, by mass part, 1 to 10 parts of Zn2+, 10 to 50 parts of PO43-, 0.01 to 1 part of functionalization graphene oxide, 5 to 15 parts of a pH adjusting agent, and 1000 parts of water. According to preparing of functionalization graphene oxide, graphene oxide is dispersed in absolute ethyl alcohol, graphene oxide dispersion liquid and a silane coupling agent are subjected to a temperature rise reflux reaction, after suction filtration washing, modified graphene oxideis dispersed into deionized water, and dispersion liquid is obtained; the obtained dispersion liquid, cationic monomers, an initiating agent and deionized water are put into a reaction kettle to be subject to temperature rise reaction, after suction filter washing, a mixture is dispersed into the deionized water, and a product is obtained. According to the prepared electrolytic phosphating liquid, under the condition that a surface active agent and a stabilizing agent are not used, the dispersion problem of the graphene oxide in the electrolytic phosphating liquid can be well solved, in the electrolytic phosphating liquid preparing process, the process is simple, convenient, and controllable, and industrialization is facilitated.

Description

technical field [0001] The invention belongs to the technical field of phosphating anticorrosion, and relates to a novel zinc-based anticorrosion electrolytic phosphating solution and a preparation method thereof, in particular to an electrolytic phosphating solution containing functionalized graphene oxide (FGO); the electrolytic phosphating solution is used for Metal finish. Background technique [0002] Metal corrosion is that metal materials are affected by air and water in the surrounding environment, and chemical or electrochemical reactions occur on the metal interface, turning the metal into an oxidized (ion) state, thereby reducing the performance of the metal material. Metal corrosion will cause huge losses. In my country, the annual loss due to corrosion accounts for about 100 million yuan. Various techniques have long been used to slow down the rate at which corrosion occurs. [0003] At present, the most important anti-corrosion method is to treat the metal su...

Claims

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Application Information

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IPC IPC(8): C25D11/36
Inventor 张心亚戴飞田玉琴谢于辉黄浩炜
Owner SOUTH CHINA UNIV OF TECH
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