Abstract
An influence of corrosion action based on choline chloride ionic liquids on magnetic properties of various grades of stainless steels has been studied. OL44, OL52, S.4571, Monel 400 and Uranus B6 stainless steels were exposured by action of ChCl-Oxalic Acid (1:0.5) M and ChCl-Malonic Acid (1:2) M solutions at 80 °C during 1 month. The temperature dependences of the specific magnetization before and after corrosion action were studied by ponderomotive method in 0.86 T magnetic field in the temperature range of 77–1000 K. Comparative analysis of temperature dependence of specific magnetization before and after ionic liquids exposure confirmed a high corrosion resistance of magnetic characteristics of the investigated stainless steels under conditions of long-term contact with based on choline chloride ionic liquids at 80 °C. Images obtained with an metallographic microscope showed a surface of the steel in an initial state contains defects which become centers of pointed corrosion. Corrosion resistance of stainless steels in contact with solutions based on choline chloride ionic liquids at moderate temperatures is satisfactory for a practical application of these materials.
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