Table 2. Continued 



Parameter 



Influence 



Effect on the Reaction 





Internal cell 



An iron-plated copper 





resistance 



cathode exhibits an 

 accelerated reaction 

 rate, probably due 

 to the decreased 

 resistance of the 

 copper substrate. 



Anode physical 







The area of the anode 



condition 





exposed to the elect- 

 rolyte determines the 

 reaction rate: more 

 area - greater rate. 



Cathode physical 



Polarization 



Rough surface cathode 



condition 



(hydrogen 



produces a higher 





overvoltage) 



reaction rate than 



a smooth cathode. j 



Electrolyte 



Internal cell 



High salinity produces 



composition 



resistance; 

 ion mobility 



high reaction rates. 



54 



