混凝土碳化腐蚀时亚硝酸钠保护钢筋作用的研究

Research on sodium nitrite protecting reinforcing bars from corrosion caused by concrete carbonation

主要探讨亚硝酸盐抑制碳化引起的混凝土中钢筋腐蚀效果,通过试验发现亚硝酸盐含量越大,抑制腐蚀效果越显著,当亚硝酸钠含量达到2 5%时,能够完全抑制碳化引起的混凝土中钢筋腐蚀。

In this paper,we have studied the effect of sodium nitrite which prevents steel corrosion caused by concrete carbonation.This study confirmed that higher nitrite content had obvious effect on protecting reinforcing bars from corrosion.It is 25% that can preserve the passive state of reinforcements adequately when concrete was carbonation.