Abstract
In order to confirm the general applicability of the previously proposed GI (General Corrosion Resistance Index) value1), influence of temperature upon the corrosion rates of three series of stainless steels (Fe-Cr, Fe-Cr-Ni, Fe-Cr-Ni-Mo alloys) in 10.2mol·kg-1 H2SO4 aqueous solution was studied. Though measured partial molar activation energy for each alloying element was different depending on the series of the alloy, the relationships between corrosion rates and GI values were commonly expressed as:
logC.R.=A′-(B′/T)-(C/T)·GI
where C.R. represents corrosion rate, T absolute temperature, and A′, B′, C are coefficients characteristic to the alloy series. GI is given by the first order polynominal.
