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A method for selectively removing stone cultural relics and gypsum weathered layers on stone surfaces

A technology for stone cultural relics and regolith, applied in the field of material corrosion and protection, can solve problems such as damage to substrates, lack of selectivity, and improper control of processing time

Inactive Publication Date: 2017-10-03
TIANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, like the exchange resin method, particle jetting technology is not selective, and improper treatment time control can also damage stone cultural relics or stone substrates

Method used

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  • A method for selectively removing stone cultural relics and gypsum weathered layers on stone surfaces
  • A method for selectively removing stone cultural relics and gypsum weathered layers on stone surfaces
  • A method for selectively removing stone cultural relics and gypsum weathered layers on stone surfaces

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1 is cosolvent with barium oxalate

[0013] Immerse the surface of the gypsum marble stone in the aqueous solution with the addition of a co-solvent, wherein the aqueous solution of the co-solvent is based on 2.6g / cm 2 The amount of co-solvent (calculated based on the mass of co-solvent required per unit area of ​​the gypsum regolith to be treated) was added to deionized water. After 36 hours of treatment, the marble test block was taken out, rinsed with distilled water, and dried for testing. The results are shown in Table 1 .

[0014] Table 1 Clearing effect

[0015]

Embodiment 2

[0016] Embodiment 2 is cosolvent with strontium oxalate

[0017] Immerse the surface of the gypsumized marble stone in the aqueous solution with the addition of a co-solvent, wherein the aqueous solution of the co-solvent is based on 1.55g / cm 2 The amount of co-solvent (calculated based on the mass of co-solvent required per unit area of ​​the gypsum regolith to be treated) was added to deionized water, and after 48 hours of treatment, the marble test block was taken out, rinsed with distilled water, dried and tested. The results are shown in Table 2 .

[0018] Table 2 Clearing effect

[0019]

Embodiment 3

[0020] Embodiment 3 is cosolvent with barium carbonate

[0021] According to 3.5g / cm 2 Add the amount of co-solvent (calculated based on the mass of co-solvent required per unit area of ​​the gypsum regolith to be treated) into deionized water to form a co-solvent aqueous solution, and apply the absorbent cotton soaked in the co-solvent aqueous solution evenly on the surface of the gypsum fossil cultural relics. After spraying and soaking for 12 hours, remove the absorbent cotton, rinse the marble with distilled water, and test it after drying. The results are shown in Table 3.

[0022] Table 3 Clearing effect

[0023]

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Abstract

The invention provides a method for selectively removing stone cultural relics and gypsum weathered layers on the surface of stone materials. The method is to use a co-solvent in an aqueous solution to dissolve and transform the harmful gypsum regolith on the stone relics and stone surface, and finally leave it in the co-solvent in the form of insoluble salts. The method removes the weathered layer of gypsum thoroughly, has no chemical residues and is selective, and the dissolution and conversion reaction of the gypsum can be automatically terminated after the removal of the gypsum, without damaging the stone substrate.

Description

technical field [0001] The invention belongs to the technical field of material corrosion and protection, and in particular relates to a method for selectively removing stone cultural relics and gypsum weathered layers on stone surfaces. Background technique [0002] Gypsum is a kind of harmful weathering product commonly found on stone cultural relics or stone surfaces. It can cause surface corrosion, cracking and peeling of stone cultural relics and stone materials. There are currently three cleaning techniques for this type of gypsum regolith, namely chemical cleaning, ion exchange cleaning, and particle jet cleaning [Zhao Linjuan. Comparison and discussion of the cleaning effects of several commonly used cleaning methods. Chinese Cultural Relics Scientific Research, 2014, 3: 85-87]. The main components of the cleaning agent in the chemical cleaning method are ammonium carbonate, ammonia water, urea, phosphate, EDTA. These methods have good cleaning effect, but they als...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/53
Inventor 杨富巍刘妍
Owner TIANSHUI NORMAL UNIV