Temperature effect of cathodic current density requirement of steel

[Chadarchie]

Does anyone have any idea where a guy could find an equation or rule for determining the current requirement (i.e. current density) at various service temperature from ambient to over 100 degrees C? Any references or suggestions on where to look would be very helpful. Thanks.

 

[YLWEA]

I'm not a C.P. guy but I could swear someone told me a long time ago that current density requirement was closely related to corrosion rate. If that is true then perhaps you could estimate current requirement change based on the corrosion rate vs. temperature change relationship....

 

[armontazeri]

In my openion, for current density, one unit adds per every degree.for example, CD=20 for 25 DegC but for 35 DegC, it will change to 30.

 

[flames]

Will depend on the corrosion parameters as the a function of temperature. For instance if you are dealing with plain old open-to-atmosphere water than the corrosion rate increases with temperature and then drops off as the oxygen solubility decreases. This would cause your current requirement to increase and then decrease.