Electrochemical Investigation of Erosion-corrosion Behavior of 6061 Aluminum Alloy in Marine Environment
Journal Title: Tribology in Industry - Year 2018, Vol 40, Issue 4
Abstract
The liquid-solid erosion-corrosion behavior of aluminum in artificial seawater medium at open circuit has been investigated using a submerged jet impingement rig. The aluminum alloy 6061 coupons subjected to erosion corrosion condition were placed normal to the impinging jet. The gap maintained between the nozzle and the specimen was 5mm. In the present study, sea sand was used as an erodent. Erosion corrosion rate was measured using potentiodynamic polarization and electrochemical impedance spectroscopy methods. At a flowrate of 4 lpm passivation was observed in the potentiodynamic polarization plot which was confirmed by the appearance of inductive loop in the Nyquist plot. At higher flowrates no such condition was observed. The system response to impedance studies was characterized by a high frequency capacitive loop and a capacitive loop at the lower frequency. Surface morphology was studied with scanning electron microscopy (semi quantitative analysis) and atomic force microscopy techniques. Elemental mapping was done with electron dispersive X-ray studies. The erosion-corrosion rate increased with increase in the flow rate and temperature. The results of this work will aid in the selection of material for controlled or reduced material loss in sea water circulating equipment’ and pipelines.
Authors and Affiliations
M. Lavanya, V. R. Murthy, P. Rao
Keywords
Related Articles
- EP ID EP460324
- DOI 10.24874/ti.2018.40.04.04
- Views 72
- Downloads 0
Wear Micro-Mechanisms of Composite WC-Co/Cr - NiCrFeBSiC Coatings. Part I: Dry Sliding
The influence of the cermet fraction in cermet/ metal composite coatings developed by High-Velocity Oxyfuel Flame (HVOF) spraying on their tribological behaviour was studied. Five series of coatings, each one containing...
Wear Resistance Increase of Samples Tribomating in Oil Composite with Geo Modifier КGМF-1
Increase of wear resistance of different types of tribomating which are functioning in fluid lubrication is possible due to: choosing more expensive and high quality material of samples that is not always sensible; apply...
Computer Simulation of Continuous SPD Process Commercially Pure Titanium Using Virtual Full Factorial Experiment with the Influence of Friction Factors
With the use of computer modeling in the environment of the software DEFORM-3D virtual conducted a full factorial experiment process, equal channel angular pressing (ECAP) by method "Conform" of commercially pure titaniu...
Theoretical and Experimental Investigations of the Rotor Vibration Amplitude of the Turbocharger and Bearings Temperature
One of the most urgent issues of the modern world and domestic automobile and tractor production is the problem of the production of efficient and reliable turbochargers. The rotor bearings largely determine the reliable...
Tribological Study of Biocompatible Hybrid Organic Molecules Film with Antibacterial Effect
Optical glass is widely used in bioengineering and various utilities such as public touchscreen displays and mobile devices. This work evaluates the features of anti‐bacterial and anti‐adhesion on Octadecyltrichlorosilan...