O 



0.009 



0.008 



0.007 



0,006 



« 0.005 



O004 



0.003 



'ij 0.002 



0.001 



























— 





































































































I04°F 



























„ 





d 









H? 



r 1 ' ^ 



> Evolution 















/ 





X 





Begi 



ns "^ 





\ 



y 



i 





v 



/^ 



r 



^ 







0- 



Tc 



l°V 



— rr 







/ 





/ 





















14 13 12 II 10 9 8 7 6 5 4 3 2 



pH 



Figure 2. Effect of pH on corrosion of mild steel 

 (From U.S. Army, Corps of Engrs, 1962) 



