A method of adjusting oxoacidity

A method of determining a window of oxoacidity for a material, the method comprising the steps of:

• selecting a material of interest and a metal hydroxide,
• providing a crucible of an inert material,
• applying the metal hydroxide in the crucible of an inert material and heating the metal hydroxide to provide a molten salt of the metal hydroxide,
• providing a working electrode made from the material of interest, a reference electrode, and a counter electrode made of an inert metal,
• inserting the working electrode, the reference electrode, and the counter electrode in the molten salt of the metal hydroxide,
• applying a gas above the molten salt of the metal hydroxide and adding an oxoacidity control component to the gas,
• applying a current between the working electrode and the counter electrode and recording the polarisation of the working electrode,
• determining the window of oxoacidity of the material of interest from the polarisation of the working electrode.

A method of determining a window of oxoacidity for a material, the method comprising the steps of selecting a material of interest and a metal hydroxide,

• providing a crucible of an inert material,
• applying the metal hydroxide in the crucible of an inert material and heating the metal hydroxide to provide a molten salt of the metal hydroxide,
• inserting a coupon made of the material of interest in the molten salt of the metal hydroxide, adding an oxoacidity control component to a processing gas and contacting the processing gas with the molten salt of the metal hydroxide,
• determining the oxoacidity window of the material from the loss of weight of the coupon.