Study on the anode-protection, applied to industrial interest metals and alloys

Abstract

Using potentiostatic polarization technique were studied the anodic protection of carbon steel in Kraft solution(paper industry), of AISI304 stainless steel in 10% HCl and 10N H2SO4+ 10(-5) M NaCl and of aluminium in 0.2% NaOH. Applying anodic protection the carbon steel corrosion rate was diminished by 40 times in Kraft solution: for AlSI304 stainless steel it resulted a reduction of corrosion rate by 20 times in 10% HCl and by 60 times in 10N H2SO4 + 10(-5) M NaCl. The aluminium corrosion decreased by 6 times in anodic protection conditions applied in 0.2% NaOH.