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Samarium cobalt magnetic material cleaning solution and cleaning method

A magnetic material and cleaning fluid technology, applied in the field of metal surface cleaning, can solve the problems of unsatisfactory cleaning effect, general cleaning effect, and environmental pollution, etc., and achieve the effect of high cleaning efficiency, low cost and low cost

Active Publication Date: 2017-12-12
NINGBO STAR MATERIALS HI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cleaning effect of organic solvents (such as gasoline) is average, and the cleaning cost is high, which pollutes the environment; alkaline and neutral water-soluble lotions are commonly used, but they often need to be heated during cleaning, and the cleaning effect is not ideal; for Acidic lotion, chromic acid and other acidic lotions have high cleaning efficiency and good effect, but they are banned or restricted due to the harmful element chromium
In addition, as a brittle product, samarium cobalt can easily lead to chipped corners during cleaning.

Method used

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  • Samarium cobalt magnetic material cleaning solution and cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

[0042] The cleaning solution for samarium-cobalt magnetic material in Examples 1-7 of the present invention is prepared by the following components by weight percentage:

[0043] Hydrochloric acid 1%-4%;

[0044] The builder is 1%-3%, which is one or two of citric acid and sodium citrate, and when the builder is citric acid, the total weight percentage of hydrochloric acid and citric acid is 2%-5%;

[0045] Corrosion inhibitor 0.01%-1%, one or more of tripolyphosphate, orthophosphate and sodium dodecyl sulfonate (SDS);

[0046] Oxygen enhancer 0.02%-0.08%, chlorine dioxide (ClO 2 ), hydrogen peroxide (H 2 O 2 ) One or two;

[0047] The balance is water.

[0048] The components and contents of the cleaning solution in Examples 1-7 are shown in Table 1.

[0049] Table 1: Components and contents of the cleaning solution in Examples 1-7

[0050]

Embodiment 8-14

[0052] The samarium cobalt magnetic material to be cleaned is cleaned using the cleaning solution in Example 7. The cleaning steps are as follows:

[0053] (1) Ultrasonic pickling. Put the product to be cleaned into an ultrasonic cleaning device whose inner wall is made of titanium alloy, and add a cleaning solution. Rotate and clean at 1000W-3000W ultrasonic power for 2s-30s to obtain the pickled product;

[0054] (2) Ultrasonic alkaline cleaning: Put the acid-washed product into an ultrasonic cleaning device whose inner wall is made of stainless steel, add weak lye, and rotate and clean at 1000W-3000W ultrasonic power for 20s-50s to obtain an alkaline cleaning product. The weak lye is sodium citrate solution or sodium polyphosphate solution;

[0055] (3) Wash with water, put the alkali-washed product into standing clean water, and rotate and wash for 5-10s to obtain a water-washed product;

[0056] (4) Heat drying, put the washed product into cotton cloth, and blow dry with a hair d...

Embodiment 15-20

[0062] The samarium cobalt magnetic material to be cleaned was cleaned under the parameter conditions of the embodiment 9 using the cleaning solutions of the embodiments 1-6, respectively.

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Abstract

The invention relates to a samarium cobalt magnetic material cleaning solution and cleaning method, and belongs to the technical field of metal surface cleaning. The samarium cobalt material cleaning solution is prepared from, by weight percent, 1%-4% of hydrochloric acid, 1%-3% of a builder, 0.01%-1% of a corrosion inhibitor, 0.02%-0.08% of an oxygen producer and the balance water. The cleaning method comprises the steps of ultrasonic acid pickling, ultrasonic alkali cleaning, water cleaning and hot blow-drying. By means of the cleaning solution and the cleaning method, a samarium cobalt magnetic material can be fast and effectively cleaned without damage.

Description

Technical field [0001] The invention belongs to the technical field of metal surface cleaning, and relates to a samarium cobalt magnetic material cleaning liquid and a cleaning method. Background technique [0002] Samarium-cobalt magnetic material is an excellent high-temperature permanent magnet material, due to its high Curie temperature (700℃~900℃), high coercivity (> 25kOe), good temperature stability, so samarium-cobalt magnetic materials play an irreplaceable role in the field of high temperature and high stability, and are currently widely used in rail transit, military and aerospace fields. [0003] The actual samarium-cobalt magnetic material has a certain shape and size, and often needs to be obtained by machining. During the machining process, the surface of the product will be stained with various oils and dusts, so a specific cleaning fluid is required for cleaning. At present, there are few cleaning solutions suitable for samarium cobalt materials on the market, a...

Claims

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Application Information

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IPC IPC(8): C23G1/04C23G1/10C23G1/00
CPCC23G1/00C23G1/04C23G1/10
Inventor 李明潘道良梁永林程书霞胡剑卢恒
Owner NINGBO STAR MATERIALS HI TECH
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