Method for preparing corrosion prevention coating with titanium in blast furnace slag

Abstract

The invention provides a method for preparing a titanium layer on the surface of low-carbon steel with a fused salt electrodeposition method by using titanium in blast furnace slag. Fused salt compositions adopted in the method include NaCl, KCl, NaF and titanium-containing blast furnace slag. The invention further provides a preparation method of corrosion prevention steel. The preparation methodincludes the following steps that the fused salt electrodeposition method is used for depositing the titanium layer on the steel surface; and fused salt compositions adopted in the fused salt electrodeposition method include NaCl, KCl, NaF and titanium-containing blast furnace slag. According to the method, the titanium-containing blast furnace slag, the NaCl, the KCl and the NaF are used as a fused salt system; and when the fused salt electrodeposition method is used for preparing the titanium deposition layer, titanium ions can better exist in the fused salt system in a low-valent oxidationstate, no disproportionated reaction happens in the fused salt electrodeposition process, and therefore the quality of the titanium deposition layer can be improved, and dendritic or powdered crystals can be basically avoided. The fused salt electrodeposition method is used for preparing the titanium corrosion prevention coating, and thus the corrosion resistance of a steel substrate can be improved obviously.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion iron and steel, and in particular relates to a molten salt composition for preparing a titanium layer by a molten salt electrodeposition method and a preparation method for anti-corrosion iron and steel. Background technique [0002] At present, in the process of preparing titanium metal by molten salt electrodeposition, most of them are based on the preparation of titanium metal powder. The methods for preparing titanium deposits on the surface of metal substrates mostly use molten alkali metal chlorides as electrolytes. Dendritic or powdery crystals are easily obtained in this molten salt system, which affects the quality of titanium deposits. And after the titanium metal is prepared, the secondary processing and utilization of the titanium metal increases the cost of the process. The titanium source used is titanium-containing blast furnace slag, saving resources. Contents of the inve...

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Problems solved by technology

And the method for preparing titanium deposition layer on the surface of the metal substrate also mostly uses the chloride of the alkali metal in molten state as the electrolyte, and it is easy to obtain dendritic or powdery crystals under the molten salt system, which affects the quality of the titanium deposition layer.

And after the titanium metal is prepared, the secondary processing and utilization of the titanium metal increases the cost of the process

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