CATHODE CONTAINER FOR SODIUM - SULFUR BATTERY, METHOD FOR FORMING SPRAYED COATING ON INNER CIRCUMFERENTIAL SURFACE OF CATHODE CONTAINER, AND QUALITY JUDGMENT METHOD FOR SPRAYED COATING

摘要

PPROBLEM TO BE SOLVED: To provide a cathode container for a sodium - sulfur battery having sprayed coating for corrosion protection having high corrosion resistance and high durability. PSOLUTION: In the cathode container for the sodium - sulfur battery having the sprayed coating on the inner circumferential surface, cross section metallographic structure of 10 m unit of thickness of the sprayed coating is dense lamellar structure 3 comprising at least three flat sprayed particles 1. The sprayed coating on the inner circumferential surface of the cathode container for the sodium - sulfur battery is Cr-Fe alloy powder containing 65% or more Cr, containing 1.5% or less OSB2/SBin metal powder, and is formed by plasma spraying in the atmosphere metal powder for spray coating which is crushed massive metal powder having a particle size of 75 m or less. PCOPYRIGHT: (C)2003,JPO