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Water-soluble non-phosphorus degreasing agent for permanent magnet material

A phosphorus-free degreaser and permanent magnet material technology, applied in the field of water-soluble phosphate-free degreaser and permanent magnet material degreasing, can solve problems such as environmental pollution, achieve large oil pollution load, excellent washing performance, prevent The effect of resorption

Active Publication Date: 2011-05-04
BEIJING ZHONG KE SAN HUAN HI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before the 1990s, sodium tripolyphosphate (STPP) was the most commonly used detergent builder, but due to the discharge of phosphorus-containing washing waste liquid, the eutrophication of rivers and lakes was caused, causing serious environmental pollution such as red tide

Method used

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  • Water-soluble non-phosphorus degreasing agent for permanent magnet material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 5 grams of sodium hydroxide, 15 grams of sodium carbonate, 5 grams of DEA, and 5 grams of Triton, respectively, and dissolve them in 1 liter of water with a pH of 7.5 and a temperature of 80°C. Divide the sintered NdFeB permanent magnet material sample into three parts and put it into it for degreasing for 1 minute, 5 minutes and 24 hours.

Embodiment 2

[0030] Weigh 5 grams of sodium hydroxide, 15 grams of sodium carbonate, 20 grams of sodium gluconate, 15 grams of PAA, and 3 grams of Triton, and dissolve them in 1 liter of water with a pH of 8.0 and a temperature of 60°C. Divide the sample of bonded NdFeB permanent magnet material into three parts and put it into it for degreasing for 1 minute, 5 minutes and 24 hours.

Embodiment 3

[0032] Weigh 10 grams of sodium hydroxide, 15 grams of sodium carbonate, 5 grams of sodium gluconate, 10 grams of PAA, and 4 grams of Triton, and dissolve them in 1 liter of water with a pH of 8.0 and a temperature of 60°C. Divide the sintered NdFeB permanent magnet material sample into three parts and put it into it for degreasing for 1 minute, 5 minutes and 24 hours.

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Abstract

The invention provides a novel water-soluble non-phosphorus degreasing agent for a permanent magnet material, comprising alkali, a cleaning auxiliary agent and a surface active agent, wherein the alkali is a mixture of two or more of sodium hydroxide, sodium carbonate and sodium gluconate; the cleaning auxiliary agent is a polyacrylic acid polymer; and the surface active agent is a low-foam non-ionic surface active agent. The novel water-soluble non-phosphorus degreasing agent for the permanent magnet material has the characteristics of neutrality, non-phosphorus property, environmental-protection performance and low temperature. According to the invention, the degreasing agent has good wettability, permeability, emulsibility and strong degreasing capability, and can prevent grease dirt from being adsorbed again; the degreasing solution is stable, has high grease dirt capacity and can be used in a long term; and meanwhile, by using the non-ionic surface active agent, the foam is little, the washing performance is superior, the water can be softened, and the corrosion of the permanent magnet material in degreasing powder can be avoided.

Description

technical field [0001] The invention relates to the field of surface treatment of materials, in particular to the degreasing technology of permanent magnetic materials. Specifically, the invention relates to a water-soluble phosphorus-free degreasing agent for permanent magnetic materials. Background technique [0002] In recent years, the application and development of neodymium iron boron (NdFeB) permanent magnet materials is very rapid, and the success of the protection of NdFeB permanent magnet materials is related to one of the key technologies whether the material can be popularized and applied. The material is mainly prepared from elements such as rare earth metal neodymium (Nd), iron and boron through powder metallurgy process. As the strongest magnetic material at present, it has been widely used in electroplating devices, machinery, medical treatment, automobiles and other fields, and its application prospects are very broad. [0003] NdFeB permanent magnet materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23G1/14
Inventor 白晓刚
Owner BEIJING ZHONG KE SAN HUAN HI TECH
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