74 



G. J. BURROWS AND C. E. FAWSITT. 



springs : the radioactivity of these is seldom quite as high 

 as this water which has just been examined. We have 

 tried the effect of adding radioactive salts to water to test 

 whether this affected the corrosion, and found that the 

 result was negative. 



Table V. 

 Corrosion as affected by stirring the solution. 



Description of Solution. 



Weight of 

 steel at start 



Loss after 

 20 days. 



0-219 

 0-207 



Loss after 

 40 days. 



a. Distilled water, unstirred 



65-401 

 64581 



0-403 

 0376 



b. Distilled water, unstirred 



65-617 

 64-223 





0-387 

 0-403 



a. Distilled water, stirred... 



64-161 

 65-215 



0573 

 0-565 



1-304 

 1-341 



b Distilled water, stirred... 



64-833 

 63-792 





1-490 

 1-490 



a. Water from Coonamble No. 2 

 Bore, stirred 



64-844 

 64-964 



0-591 

 0-612 



1-536 

 1-652 



6- Water from Ooonamble No. 2 

 Bore, stirred. 



64-002 

 64-701 





1-344 

 1-339 



In the experiments marked (a) the pieces of steel after being weighed 

 at the end of twenty days were put back for another twenty, to make up 

 the total. In the experiments marked (b) the steel was not disturbed 

 for forty days. 



These experiments show (1) that the bore-waters tested 

 here are not noticeably more corrosive than distilled water, 

 (2) that moderate stirring of the solution has an accelera- 

 tive effect on the rusting process, (3) that the initial rate 

 of corrosion does not stand in any simple relation to the 

 rate which sets in after some time has elapsed. 



We have noticed, however, that under different conditions 

 there are great differences in the character of the corrosion. 



