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A compound silicate corrosion inhibitor for the protection of iron cultural relics

A technology for cultural relics protection and silicate, applied in the field of corrosion inhibitors

Inactive Publication Date: 2011-12-28
中国文化遗产研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The object of the present invention is to provide a compound silicate corrosion inhibitor used for the protection of iron cultural relics, to overcome the defects caused by the single use of silicate corrosion inhibitor

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  • A compound silicate corrosion inhibitor for the protection of iron cultural relics
  • A compound silicate corrosion inhibitor for the protection of iron cultural relics

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Embodiment Construction

[0015] The main advantage of silicate as a corrosion inhibitor for iron cultural relics is that silicate can react with ferric iron to form a precipitated film, which can realize partial rust protection. However, silicate is easy to form silicon scale that is difficult to remove, and it is not easy to inhibit, and the corrosion inhibition effect is not ideal. It is often used in combination with polyphosphate, organic phosphonic acid, aluminate, zinc salt and other corrosion inhibitors.

[0016] The corrosion inhibition mechanism of silicate corrosion inhibitor, a colloidal particle that is believed to be negatively charged in water, combines with iron ions dissolved on the metal surface to form a silicic acid gel, which covers the metal surface to inhibit corrosion , so silicate is a precipitated film type corrosion inhibitor. Another point of view is that the original corrosion products in water and silicate form an adsorptive mixture protective film. This film is divided i...

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Abstract

A compound silicate corrosion inhibitor used for the protection of iron cultural relics, with sodium silicate as the main agent, adding sodium gluconate and zinc sulfate, in order to further improve the corrosion inhibition effect of the corrosion inhibitor, tungstic acid is also added sodium. Among them, the content of sodium silicate is 2-10g / L, the content of sodium gluconate is 0.1-0.3g / L, the content of zinc sulfate is 0.1-0.2g / L, and the content of sodium tungstate is 1-2g / L. The compound silicate corrosion inhibitor of the present invention has good corrosion inhibition effect on simulated ancient white cast iron, and the corrosion inhibition effect on low-silicon and low-sulfur white iron is particularly remarkable, and the corrosion inhibition rate reaches more than 80%.

Description

technical field [0001] The invention relates to a corrosion inhibitor used for the protection of iron cultural relics, in particular to a compound silicate corrosion inhibitor used for the protection of iron cultural relics. Background technique [0002] Corrosion inhibitor: refers to a substance that can reduce the corrosion of the medium and protect the metal from corrosion by adding a small amount to the medium. According to the influence of corrosion inhibitors on the electrochemical corrosion process of metals in the medium, they are divided into anodic type, cathodic type and mixed type corrosion inhibitors. Anodic corrosion inhibitors include chromates, nitrates, nitrites, orthophosphates, silicates, benzoates, and the like. They can increase the polarization of the anode, thereby positively shifting the corrosion potential, usually the anions of the anode corrosion inhibitor move to the anode surface to passivate the metal. Cathodic corrosion inhibitors include pol...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F11/18C23F11/12
Inventor 沈大娲马清林
Owner 中国文化遗产研究院