Effect of Red Mud Reinforcement on the Corrosion Resistance of Aluminium 6061 Metal Matrix Composites in Sea Water | Chapter 6 | Chemical and Materials Sciences: Research Findings Vol. 4

 

Corrosion can affect the metal matrix composite in a variety of ways, which depend on its nature and the environmental conditions prevailing. The red mud content in aluminium 6061 alloy plays a significant role in the corrosion resistance of the material. A lot of research has been done on corrosion characteristics of particulate reinforced metal matrix composites, but no concrete investigation has been made on red mud particulate reinforced with aluminium alloy 6061 metal matrix composites. The present investigation aims to evaluate the corrosion properties of red mud particulate reinforced aluminium 6061 metal matrix composites. Red mud particulates reinforced varying from two to six per cent by weight in steps of two per cent under dry conditions. Composites are prepared by liquid melt metallurgy techniques using the vortex method. Castings are cut, turned and shaped into the required size to prepare the specimens for evaluation of the corrosion properties. Corrosion tests were conducted at room temperature (230 °C) using the conventional weight loss method according to ASTM G69-80. The corrodent used for the tests was Arabian Sea water collected from Malpe beach, Udupi District, Karnataka. Weighed specimens dipped in seawater. Specimens were taken out at every 24 hours intervals up to 96 hours. Four specimens for each condition and time were immersed in the corrosive solutions. In all 16 specimens of matrix and composites were immersed in the corrodent. Corrosion rates were calculated using the formula 534DAT/W. In each case, the corrosion rate in seawater decreases with an increase in exposure time for matrix and metal matrix composites due to passivation induced by aluminium. Therefore, incorporating red mud particulates in Aluminium alloy 6061 enhances corrosion resistance, making it a more effective material for marine and other corrosive environments.

 

Author(s) Details

 

P.V. Krupakara
Department of Chemistry, Adrsha Institute of Technology, Bangalore, India.

 

H.R. Ravikumar
Department of Chemistry, M.S. Engineering College, Bangalore, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsrf/v4/4694

 

Effect of Red Mud Reinforcement on the Corrosion Resistance of Aluminium 6061 Metal Matrix Composites in Sea Water | Chapter 6 | Chemical and Materials Sciences: Research Findings Vol. 4

 

Corrosion can affect the metal matrix composite in a variety of ways, which depend on its nature and the environmental conditions prevailing. The red mud content in aluminium 6061 alloy plays a significant role in the corrosion resistance of the material. A lot of research has been done on corrosion characteristics of particulate reinforced metal matrix composites, but no concrete investigation has been made on red mud particulate reinforced with aluminium alloy 6061 metal matrix composites. The present investigation aims to evaluate the corrosion properties of red mud particulate reinforced aluminium 6061 metal matrix composites. Red mud particulates reinforced varying from two to six per cent by weight in steps of two per cent under dry conditions. Composites are prepared by liquid melt metallurgy techniques using the vortex method. Castings are cut, turned and shaped into the required size to prepare the specimens for evaluation of the corrosion properties. Corrosion tests were conducted at room temperature (230 °C) using the conventional weight loss method according to ASTM G69-80. The corrodent used for the tests was Arabian Sea water collected from Malpe beach, Udupi District, Karnataka. Weighed specimens dipped in seawater. Specimens were taken out at every 24 hours intervals up to 96 hours. Four specimens for each condition and time were immersed in the corrosive solutions. In all 16 specimens of matrix and composites were immersed in the corrodent. Corrosion rates were calculated using the formula 534DAT/W. In each case, the corrosion rate in seawater decreases with an increase in exposure time for matrix and metal matrix composites due to passivation induced by aluminium. Therefore, incorporating red mud particulates in Aluminium alloy 6061 enhances corrosion resistance, making it a more effective material for marine and other corrosive environments.

 

Author(s) Details

 

P.V. Krupakara
Department of Chemistry, Adrsha Institute of Technology, Bangalore, India.

 

H.R. Ravikumar
Department of Chemistry, M.S. Engineering College, Bangalore, India.

 

Please see the book here:- https://doi.org/10.9734/bpi/cmsrf/v4/4694

Surface Precipitation and Passivation on Ultrafine-Grained Titanium in Physiological Solution | Chapter 10 | Current Perspectives on Chemical Sciences Vol. 3

 This study is an attempt to understand how Ti substrate microstructures influence the change in chemical composition and the repassivation of the titanium surface immersed with bovine serum albumin applied in the simulated body fluid solution. As a goal, commercial pure titanium (CP-Ti) and Ti-0.2Pd were used. For the grain refining of both metals, equivalent channel angular pressing was done. To create different microstructures for comparison, some titanium specimens were subjected to heat-treatment. For the assessment of corrosion resistance and passivation activity, electrochemical impedance spectroscopy ( EIS) was measured. X-ray photoelectronic spectroscopy and scanning electron microscopy have studied the surface compositions and morphologies. The solution used in corrosion and immersion testing was pure simulated body fluid bubbled with N2. Corrosion test results showed a higher resistance of ECAP Ti-0.2Pd to corrosion than ECAP CP-Ti. Insignificant Warburg impedance suggested the formation of porous layers on ECAP titanium and thus easy layer transformation of ions and the corrosion product. The immersion test results showed that more precipitated particles were produced on ECAP metals than on metals that were heat treated. Enhanced precipitates formed on ECAP Ti-0.2Pd were established due to an improved Ti-0.2Pd hydrogen evolution reaction relative to ECAP CP-Ti. The rainfall consisted of C, N, O, Ti, Ca and P. The bioactivity improvement of the Ti implant is basically advantageous for more Ca, P, Ti and O contents in surface deposition on ultrafine grained Ti. This result offers a way to enhance the bio-bonding between the implant and the surrounding tissue.

Author(s) Details

Qing Zhou
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Cheng-Hong Zou
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Lei Wang
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

Chun-Yang Su
College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/318