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A method for removing oxides on the surface of tin-based alloys

A surface oxide and tin-based alloy technology, applied in the field of alloy surface treatment, can solve the problems of poor oxide removal effect and high operation cost, and achieve the effect of low processing cost, good processing effect and simple operation

Active Publication Date: 2019-10-18
HONGHE COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solution provided by the invention can make up to a certain extent the defects of poor oxide removal effect and high operating cost existing in the existing tin-based alloy surface oxidation treatment method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for removing oxides on the surface of tin-based alloys, characterized in that the treatment method comprises the following steps:

[0022] (1) Use a blowtorch to heat the tin-based alloy with an oxyacetylene flame for 20 minutes, and then remove rust and dirt with a wire brush;

[0023] (2) Soak the tin-based alloy to remove rust and dirt in 14% hydrochloric acid solution for 15 minutes, and then place it in hot water at 90°C to remove excess acid;

[0024] (3) Cooking the tin-based alloy treated in step (2) in 10% caustic soda solution at 75°C for 9 minutes, and then placing it in hot water at 80°C to remove excess alkali;

[0025] (4) Put the tin-based alloy treated in step (3) into 15% dilute sulfuric acid solution for 5 minutes of weak corrosion, then immediately put it into alkaline solution for neutralization, and then wash it with hot water at 80°C.

Embodiment 2

[0027] A method for removing oxides on the surface of tin-based alloys, characterized in that the treatment method comprises the following steps:

[0028] (1) Use a blowtorch to heat the tin-based alloy with an oxyacetylene flame for 30 minutes, and then use a wire brush to remove rust and dirt;

[0029] (2) Soak the tin-based alloy to remove rust and dirt in 11% hydrochloric acid solution for 20 minutes, and then place it in hot water at 80°C to remove excess acid;

[0030] (3) Cooking the tin-based alloy treated in step (2) in 10% caustic soda solution at 85°C for 6 minutes, and then placing it in hot water at 90°C to remove excess alkali;

[0031] (4) Put the tin-based alloy treated in step (3) in 15% dilute sulfuric acid solution for 4 minutes of weak corrosion, then immediately put it into alkaline solution for neutralization, and then wash it with hot water at 90°C.

Embodiment 3

[0033] A method for removing oxides on the surface of tin-based alloys, characterized in that the treatment method comprises the following steps:

[0034] (1) Use a blowtorch to heat the tin-based alloy with an oxyacetylene flame for 20 minutes, and then remove rust and dirt with a wire brush;

[0035] (2) Soak the tin-based alloy to remove rust and dirt in 11% hydrochloric acid solution for 20 minutes, and then place it in hot water at 90°C to remove excess acid;

[0036] (3) Cooking the tin-based alloy treated in step (2) in 10% caustic soda solution at 75°C for 6 minutes, and then placing it in hot water at 90°C to remove excess alkali;

[0037] (4) Put the tin-based alloy treated in step (3) into 15% dilute sulfuric acid solution for 5 minutes of weak corrosion, then immediately put it into alkaline solution for neutralization, and then wash it with hot water at 80°C.

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PUM

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Abstract

The invention relates to the technical field of alloy surface treatment, in particular to a surface oxidation treatment method of a tin base alloy. The treatment method comprises the following steps of (1) using a blast lamp, using an oxygen acetylene flame for heating the tin base alloy, heating for a certain time, and then using a steel wire brush for removing rust and dirt; (2) putting the tinbase alloy without the rust and the dirt into a hydrochloric acid solution with a certain mass fraction, soaking for 15 to 20min, then putting in hot water with the temperature being 80 to 90 DEG C, and removing redundant acid; (3) stewing the tin base alloy treated through the step (2) in 10 percent of alkaline liquor with the temperature being 75 to 85 DEG C for 6 to 9min, then putting into hotwater with a certain temperature, and removing redundant alkali; (4) putting the tin base alloy treated through the step (3) into 15 percent of dilute sulphuric acid solution, carrying out weak corrosion for a certain time, then immediately putting into an alkaline solution, neutralizing, and then cleaning by using hot water with the temperature being 80 to 90 DEG C. The treatment method providedby the invention can be used for effectively removing surface oxide of the tin base alloy, and is low in treatment cost and worth popularizing and applying.

Description

technical field [0001] The invention relates to the technical field of alloy surface treatment, in particular to a method for removing oxides on the surface of tin-based alloys. Background technique [0002] Babbitt alloy (including tin-based bearing alloy and lead-based bearing alloy) is the most well-known bearing material, named after the invention of American Babbitt, because it is white, also known as white alloy, and has anti-friction properties. Alloy and lead-based Babbitt alloy are the only materials suitable for rotating relative to low-hardness shafts. Compared with other bearing materials, they have better adaptability and press-fit properties, and are widely used in large marine diesel engines, turbines, and alternators. , and other mining machinery and large rotating machinery. [0003] The main components of tin-based bearing alloys are tin, lead, antimony and copper. Among them, antimony and copper are used to improve the strength and hardness of the alloy....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/10C23F1/30C23F4/00
Inventor 吴昊王鸿钧杨亚河张文斌江洁
Owner HONGHE COLLEGE