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ISO/TC156 N6672 & N6673 - ISO/NP 4905 Corrosion of metals and alloys - Electrochemical test methods - Guideline for electrochemical measurements in high temperature molten salts

Scope

This international standard describes the apparatuses for electrochemical measurements of metals and alloys in high temperature molten salts, and the procedure of potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) measurement in high temperature molten salts which are under static conditions.

Purpose

In recent years, high-temperature molten salts have stated to use heat medium in the solar power generation system, such as solar concentrated power plants. Moreover, materials used for boilers and chemical plants are severely corroded by molten salts at high temperatures. Materials selection for such high temperature plants is usually difficult for producers in this field, because there is no standard test method to evaluate the corrosion behavior of materials quantitatively.

Quantitative evaluation of materials properties under the environments containing high-temperature molten salts is one of the critical issues because there are many parameters to take into account the corrosion behavior. It is known that the corrosion of metallic materials in the molten salt proceeds by an electrochemical reaction, therefore, there is a recognized need for developing the industrial standards to evaluate materials properties by electrochemical technique.

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