Salt Bath Furnaces

Salts baths used for heating ensure good control uniform temperature and high heating rates are compared to air or gas. The molten salts or metals have higher conductivity than air or gas. The salt may be heated from outside if it is non-conducting or by passing a low voltage alternating current between electrodes placed in the salt. Direct current is not used because it is likely to cause electrolysis of salt. Among metals, lead is commonly used. Wide range of temperature may be obtained from such baths.