MgCl2对锌在干湿交替环境中腐蚀行为的影响
尹奇,刘淼然,刘雨薇,潘晨,王振尧

Effect of MgCl2 Deposite on Simulated Atmospheric Corrosion of Zn via Wet-dry Altertnating Corrosion Test
Qi YIN,Miaoran LIU,Yuwei LIU,Chen PAN,Zhenyao WANG
表3 离子强度为0、温度为25℃时各反应式及其相应的平衡常数[18]
Table 3 Reactions and equilibrium constants at ionic strength 0 at 25℃ and 1.013×105 Pa
Formulalg K0*
H2O ? OH-+H+-14
CO2+H2O ? H2CO3-1.468
CO2+H2O ? HCO3-+H+-7.82
CO2+H2O ? CO32-+2H+-18.149
Zn2++2CO2+2H2O ? Zn(CO3)22-+4H+-26.668
Zn2++CO2+H2O ? ZnCO3(s)+2H+-12.849
Zn2++CO2+H2O ? ZnHCO3++H+-5.72
5Zn2++2CO2+8H2O ? Zn5(OH)6(CO3)2(s)+10H+-45.988
Zn2++H2O ? ZnOH++H+-8.96
Zn2++2H2O ? Zn(OH)2(s)+2H+-16.9
Zn2++3H2O ? Zn(OH)3-+3H+-28.4
Zn2++4H2O ? Zn(OH)42-+4H+-41.2
Zn2++6H2O ? Zn(OH)64-+6H+-57.8
2Zn2++H2O ? Zn2OH3++H+-9.0
Zn2++H2O ? ZnO(s)+2H+-11.14
Zn2++2H2O ? α-Zn(OH)2(s)+2H+-12.45
Zn2++2H2O ? ε-Zn(OH)2(s)+2H+-11.5
Zn2++Cl- ? ZnCl+0.43
Zn2++2Cl- ? ZnCl20.45
Zn2++3Cl- ? ZnCl3-0.5
Zn2++4Cl- ? ZnCl42-0.2
Zn2++Cl-+H2O ? ZnClOH+H+-7.48
5Zn2++2Cl-+9H2O ? Zn5(OH)8Cl2·H2O(s)+9H+-38.5