Non-destructive cleaning method for rust on surface of copper object

A technology of object surface and copper, applied in the direction of using liquid cleaning methods, cleaning methods and utensils, chemical instruments and methods, etc., can solve problems such as substrate damage, achieve clear lines and reduce mechanical losses

Pending Publication Date: 2022-02-08
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: In order to solve the problem of substrate damage caused by using corundum and glass beads as abrasives in the prior art, the present invention uses sodium bicarbonate crystal particles less than 100 μm as abrasives, and sprays sodium bicarbonate microcrystalline abrasives in a low-pressure injection mode To the surface of copper objects, through the impact, friction, peeling and other effects generated at the moment of collision, the rust on the surface of copper objects can be cleaned

Method used

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  • Non-destructive cleaning method for rust on surface of copper object
  • Non-destructive cleaning method for rust on surface of copper object
  • Non-destructive cleaning method for rust on surface of copper object

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation of embodiment 1 sodium bicarbonate crystal particle abrasive

[0031] Weigh 100 grams of sodium bicarbonate crystals, grind them for 10 minutes, and then pass through 150 mesh, 200 mesh, 325 mesh, 500 mesh and 600 mesh sieves and classify and sieve, retain 19 grams of crystals on the 600 mesh sieve, particle size 20um ~25um, 17g of partial crystals retained on 500 mesh sieve, particle size 26um~30um, 18g of partial crystals retained on 325 mesh sieve, particle size of 31um~45um Among them, 16 grams of partial crystals retained on 200 mesh sieve grams, particle size 46um-75um, 15 grams of partial crystals retained on the 150-mesh sieve, particle size 76um-100um, of which 200 mesh corresponds to 75um, and 500 mesh corresponds to 30um. (See figure 2 )

Embodiment 2

[0033] Such as figure 1 Shown, a kind of cleaning device, this cleaning device comprises air compressor 1, deionized water tank 2, turbine 5, sodium bicarbonate abrasive feed inlet 7, gas-solid-liquid mixing sandblasting machine 8, gas-solid mixing pipeline 9 , a gas-liquid mixing pipeline 10, a hand-held gas-solid-liquid mixing spray gun 11 and a cleaning operation room 12, the air compressor 1 and the deionized water tank 2 are respectively connected to the turbine 5 through a branch, and then the parallel air is separated through the branch. The solid mixing pipeline 9 and the gas-liquid mixing pipeline 10 are connected to the gas-solid-liquid mixing sandblasting machine 8, and the gas-solid mixing pipeline 9 and the gas-liquid mixing pipeline 10 are arranged side by side and jointly connected with the hand-held gas-solid-liquid mixing spray gun 11 and juxtaposed In the cleaning operation room 12.

[0034] The steps of a non-destructive cleaning method for surface corrosio...

Embodiment 4

[0051] The non-destructive cleaning method of the surface corrosion of embodiment 4 copper coins

[0052] 1) Pre-cleaning stage: Start the air compressor, control the compressed air pressure to 0.4MPa, open the valve, pass the deionized water stored in the cleaning liquid tank into the turbine through the water inlet pipeline, and the deionized water and compressor air pass through The gas-solid-liquid sandblasting machine reaches the nozzle, and the copper coins 3 to be cleaned are placed in the cleaning room and the parts of the copper cultural relics are spray-cleaned through the hand-held mixing nozzle.

[0053] 2) Intermediate cleaning stage: close the valve of the cleaning liquid tank, open the sodium bicarbonate abrasive feed port, use 200-mesh sodium bicarbonate abrasive to feed, the compressed air and sodium bicarbonate abrasive are mixed through the gas-solid-liquid sandblasting machine to reach the nozzle Place the copper coin 3 to be cleaned in the cleaning box to ...

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Abstract

The invention discloses a non-destructive cleaning method for rust on the surface of a copper object. The method comprises the following steps: by taking compressed air as power, sequentially spraying deionized water, a sodium bicarbonate grinding material and deionized water to the surface of a copper object in a mechanical spraying manner for rust cleaning. According to the invention, by adopting the method, the cleaning degree can be adjusted according to actual requirements; the macroscopic observation results of naked eyes and optical microscopes show that the rust on the surface of copper coins can be effectively cleaned, obvious flat copper coin textures and yellow copper money substrates can be observed, the substrates are not damaged; and microscopically, a scanning electron microscope-energy spectrum analysis technology SEM-EDS is used for carrying out surface micro-area morphology and component change evaluation before and after cleaning, and it is found that the proportion of C and O on the surface of the copper coins before and after cleaning is obviously reduced, the content of Cu and Zn is increased, it is indicated that surface oxides are removed, and the cleaning effect is good.

Description

technical field [0001] The invention belongs to the cleaning field of copper objects, in particular to a non-destructive cleaning method for surface corrosion of copper objects. Background technique [0002] Copper is easily oxidized to produce various rusts under natural conditions, such as malachite (CuCO 3 ·Cu(OH) 2 ), basic copper carbonate (2CuCO 3 ·Cu(OH) 2 ), basic copper chloride CuCl 2 3Cu(OH) 2 )Wait. Corrosion continued to deepen, resulting in deformed copper utensils, peeling off surface decoration, and blurred inscriptions. Copper utensils are exposed to air, light and moisture, and the corrosion process is intensified. [0003] Through cleaning, the copper utensils can be properly repaired as soon as possible, the preservation and service life of these utensils can be extended, and it can play a greater role in all aspects. The traditional methods of cleaning copper utensils rust include physical cleaning and chemical cleaning. The physical cleaning me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/08B24C3/32B24C5/02B24C11/00B24C7/00B08B3/02
CPCB24C1/086B24C3/32B24C5/02B24C11/00B24C7/0046B08B3/026
Inventor 王明亮李晓萱江周宇卞宇超邢可从扬
Owner SOUTHEAST UNIV
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