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 82
- Downloads 0
Mixed Lubrication Solution of Dynamically Loaded Radial Slide Bearings
A solution of radial slide bearing dynamics and tribology incorporating the influences of real surface roughness contacts or the influence of surface roughness on bearing lubrication is presented in this paper. Finite di...
Development of Asbestos - Free Brake Pad Using Bagasse
Development of asbestos-free brake pad using bagasse was investigated with a view to replace the use of asbestos whose dust is carcinogenic. The bagasse were sieve into sieve grades of 100, 150, 250, 350 and 710μm. the s...
Effect of Lubricating Oil on Tribological behaviour in Pin on Disc Test Rig
A test method has been developed to evaluate the friction and wear behaviour of cylinder liner and piston ring materials for four stroke engine system. Realistic engine oils are used to describe the behaviour of this tes...
Investigation of Structure and Wear Resistance of Nanocomposite Coating of Chemical Nickel
The investigation results of the structure and wear resistance of composite chemical coatings on the nickel base obtained by means of mutual codeposition with nanodispersed particles of aluminum oxide and potassium polyt...
Defining a Theoretical Model of Wear - Caused Failure of Tool Machine Elements
This paper considers production equipment failures caused by wear. A short overview is given on the results of statistically processed data on production equipment failures, gained by observing 20 representative and, fro...