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Corrosion inhibitor for bronze with alkaline copper chloride rust and application thereof

A technology of copper chloride and corrosion inhibitor, applied in the field of corrosion and protection of metal materials, to achieve the effect of improving stability and optimizing unfavorable structures

Active Publication Date: 2016-07-20
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the way that basic copper chloride rust has an adverse effect on bronze, the present invention has found through research that the rare earth ion corrosion inhibitor has the potential to protect bronze with basic chloride copper rust, and rare earth ion corrosion inhibitors have not yet been used in the prior art. Corrosion Inhibitor Protects Corroded Bronze Report

Method used

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  • Corrosion inhibitor for bronze with alkaline copper chloride rust and application thereof
  • Corrosion inhibitor for bronze with alkaline copper chloride rust and application thereof
  • Corrosion inhibitor for bronze with alkaline copper chloride rust and application thereof

Examples

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Embodiment 1

[0016] (1) Solution preparation

[0017] Preparation of simulated acid rain solution: [Na 2 SO 4 ]=0.2g / L, [NaHCO 3 ]=0.2g / L, adjust the pH to 5 with dilute sulfuric acid. All the utensils used in the experiment were washed with deionized water, and all the solutions used were prepared with deionized water.

[0018] (2) Bronze electrodes

[0019] Weld copper wires on the back of the bronze sample, then seal the sample with epoxy resin, and then polish to expose the working surface, the working surface area is 1.0cm 2 , Before the test, use 200#, 400#, 600#, 800# and 1000# sandpaper to polish the working surface in turn, rinse the working surface with deionization, and finally clean the working surface with acetone, put it in a desiccator to dry for later use.

[0020] (3) Preparation of basic copper chloride rust on the surface of bronze electrode

[0021] Firstly, CuCl rust was prepared by electrochemical method, and the bare bronze was 0.028mol / LNaCl+0.01mol / LNa at the...

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Abstract

The invention relates to a corrosion inhibitor for bronze with alkaline copper chloride rust and application thereof. The corrosion inhibitor comprises cerium sulfate or cerium nitrate. The corrosion inhibitor for the bronze with the rust is friendly to the environment and is harmless to people and the environment. When the concentration of the corrosion inhibitor in simulated acid rain solutions is 1000 mg / L, the corrosion inhibition efficiency of the cerium sulfate is 96.8%, and the corrosion inhibition efficiency of the cerium nitrate is 95.0%.

Description

technical field [0001] The invention belongs to the technical field of corrosion and protection of metal materials, and in particular relates to rare earth ion corrosion inhibitors cerous sulfate and cerous nitrate as the copper corrosion inhibitor with basic chloride rust bronze and the application thereof. Background technique [0002] Bronze ware is a treasure in the hall of human civilization, with extremely high historical value, cultural value and artistic value. However, during the excavation and preservation process, many bronzes were stained with "powder rust", the main component of which is basic copper chloride. This rust product poses a fatal threat to the preservation of bronze ware. If it is not properly handled in time, the bronze ware will be pulverized, perforated or even completely destroyed in a short period of time. Researchers generally classify it as "noxious rust." However, organic corrosion inhibitors, such as azoles and imidazoles, are mostly used ...

Claims

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Application Information

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IPC IPC(8): C23F11/18
CPCC23F11/181C23F11/182C23F11/187
Inventor 王菊琳王天然
Owner BEIJING UNIV OF CHEM TECH