A kind of samarium cobalt magnetic material cleaning liquid 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 high cleaning cost, and achieve the effects of reducing formula cost, fast and efficient cleaning, and high solubility

Active Publication Date: 2019-03-01
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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  • A kind of samarium cobalt magnetic material cleaning liquid and cleaning method
  • A kind of samarium cobalt magnetic material cleaning liquid and cleaning method
  • A kind of samarium cobalt magnetic material cleaning liquid and cleaning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-7

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

[0043] Hydrochloric acid 1%-4%;

[0044] Builder 1%-3%, is one or both 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 dodecylsulfonate (SDS);

[0046] Oxygenating agent 0.02%-0.08%, is chlorine dioxide (ClO 2 ), hydrogen peroxide (H 2 o 2 ) either or both;

[0047] The balance is water.

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

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

[0050]

Embodiment 8-14

[0052] Use the cleaning solution in Example 7 to clean the samarium cobalt magnetic material to be cleaned, and 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 a titanium alloy material, and add a cleaning solution, and rotate and clean it for 2s-30s under an ultrasonic power of 1000W-3000W to obtain a pickling product;

[0054] (2), ultrasonic alkaline cleaning, put the pickling product into an ultrasonic cleaning device whose inner wall is made of stainless steel, and add weak lye, and rotate and clean it for 20s-50s under 1000W-3000W ultrasonic power to obtain the alkaline cleaning product, Weak lye is sodium citrate solution or sodium polyphosphate solution;

[0055] (3), water washing, put the alkali-washed product into standing clear water, rotate and wash for 5s-10s, and obtain the water-washed product;

[0056] (4) Drying with heat, putting the washed product int...

Embodiment 15-20

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

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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 solution 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 coercive force (>25kOe), and good temperature stability, samarium-cobalt magnetic material can be used at high temperature and The field of high stability plays an irreplaceable role, and is currently widely used in rail transportation, military and aerospace and other fields. [0003] The actually used 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 powders, so a specific cleaning solution is required for cleaning. At present, there are few cleaning solutions s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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