In order to investigate the quantitative behavior of galvanic corrosion in weld joints between stainless std이 and carbon steel, electrochemical polarization experiments were performed at pH4, pH7 and pH10 with boric acid concentration 4000ppm, and water temperature were selected as $35^{circ}$C and $60^{circ}$C</TEX>. As the results, the galvanic corrosion phenomena of carbon steel weld material at $60^{circ}$C was revealed $2{1over2}$ times higher corrosion rate than that at $35^{circ}$C</TEX> condition. The corrosion rate of stainless steel was almost inedependent of the variation of pH. The significant corrosion rates of carbon steel and the weld joint of carbon-carbon steel were observed at pH 4.