About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering IV
|
Presentation Title |
An Electrochemical Study of Ferrous and Nonferrous Materials in an Engine Coolant Environment |
Author(s) |
Gaurav Argade, Anusha Chilukuri, Justin Perry, Monica Gehrich, Erica Raisor, Corey Trobaugh |
On-Site Speaker (Planned) |
Gaurav Argade |
Abstract Scope |
A study was conducted to identify the threshold concentrations of chloride contaminant in an inhibited engine coolant on three different metallic substrates – cast iron, cast aluminum and brass. All three metallic systems showed a reduction in the breakdown potentials during potentiodynamic polarization carried out with increasing chloride concentrations from 0 to 1000 ppm. Higher anodic current densities and lower breakdown potentials were observed for cast aluminum at 1000 ppm chloride concentration compared to the other two metals. However, intermittent electrochemical testing of the immersion tested cast Al and cast iron samples at 90C in inhibited coolants containing up to 2000 ppm Cl additions, showed increased corrosion resistance of cast Al (~ 2.5 orders of magnitude lower corrosion currents and anodic currents) compared to cast Fe. SEM analysis showed that localized trenching around the graphite flakes resulted in high anodic current densities and low breakdown potentials for cast Fe. |
Proceedings Inclusion? |
Planned: |
Keywords |
Aluminum, Environmental Effects, |