Journal of Chemistry / 2013 / Article / Tab 1

Research Article

Effects of Immersion Time and 5-Phenyl-1H-tetrazole on the Corrosion and Corrosion Mitigation of Cobalt Free Maraging Steel in 0.5 M Sulfuric Acid Pickling Solutions

Table 1

Corrosion parameters obtained from the potentiodynamic polarization curves shown in Figures 1, 2, and 3 for maraging steel electrode that has been immersed for different exposure intervals in 0.5 M H2SO4 containing different PHTA concentrations.

MediumParameter
IE
(mVdec−1)(mV)( A cm−2)(mVdec−1)(  cm2)(mmy−1)(%)

0.5 M H2SO4 (0 min)−135−3001900350.01122.09
+1.0 mM PHTA (0 min)−135−283880280.01710.2354
+5.0 mM PHTA (0 min)−140−270670300.0257.7965
0.5 M H2SO4 (60 min)−100−3003300480.01238.37
+1.0 mM PHTA (60 min)−120−2951450500.02316.8656
+5.0 mM PHTA (60 min)−105−2651050550.02812.2168
0.5 M H2SO4 (120 min)−95−2904300550.01349.99
+1.0 mM PHTA (120 min)−100−2801720580.02917.0060
+5.0 mM PHTA (120 min)−122−2751190600.03913.8472

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