Electrochemical noise analysis of galvanized steel immersed in saturated calcium hydroxide solutions
- CINVESTAV-IPN Merida (Mexico)
Steel (UNS G10400) was galvanized by using a commercial hot-dip galvanizing method. The coated steel was immersed in a saturated calcium hydroxide (Ca[OH]{sub 2}) solution (pH {approx} 12.4) and in a saturated Ca(OH){sub 2} + 0.5 M potassium hydroxide (KOH) solution (pH {approx} 13.4). The potential and current were measured simultaneously while the coated steel was kept immersed in the solution. The potential was measured against a saturated calomel electrode (SCE) and by using an electrometer. The current was measured between two identical samples using a zero resistance ammeter (ZRA). The relationship between the performance of the zinc coating and the noise information obtained was discussed. The electrochemical potential was found to be correlated to the corrosion rate of the coated steel. The current pattern and the standard deviation of the current was found to be well correlated with the corrosion rate.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 684432
- Journal Information:
- Corrosion, Vol. 55, Issue 8; Other Information: PBD: Aug 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
Influence of calcium ion in concrete pore solution on the passivation of galvanized steel bars
Effect of Solution pH on Layered Double Hydroxide Formation on Electrogalvanized Steel Sheets