Desmond Klenam

Dr. Desmond Klenam

ADU & CHMT, University of the Witwatersrand, Johannesburg, Gauteng, South Africa
orcid

Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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8 January 2020 in Corrosion Reviews
Verified
Journal Article
Closed access
PDF file
Michael Oluwatosin BodunrinMichael Oluwatosin Bodunrin
Michael Oluwatosin Bodunrin
LCLesley H. Chown
Lesley H. Chown
JMJosias W. van der Merwe
Josias W. van der Merwe
KAKenneth K. Alaneme
Kenneth K. Alaneme
COChristian Oganbule
Christian Oganbule
NMNthape P. Mphasha
Nthape P. Mphasha
This paper presents an overview of the corrosion behavior of titanium (Ti) alloys in both acidic and saline solutions. The solutions covered in this review are essentially the typical electrolytes encountered by Ti alloys when applied under service conditions. Although Ti alloys are generally known to be corrosion resistant, this review identifies strong reducing acids and fluoride-containing solutions as electrolytes that corrode Ti and its alloys. The pathways that the knowledge of the corrosion behavior of Ti alloys have followed from the 1950s to date are captured in this review. Based on this, the different factors influencing the corrosion behavior of Ti alloys are highlighted and the different research concepts for improving the corrosion resistance of Ti alloys in both solutions are discussed. The limitations of these research concepts are mentioned and the directions for future research are proposed.
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5 January 2024 in Engineering Failure Analysis
Verified
Journal Article
Open access
Desmond KlenamDesmond Klenam
Desmond Klenam
FMF. McBagonluri
F. McBagonluri
OBO.S. Bamisaye
O.S. Bamisaye
TAT.K. Asumadu
T.K. Asumadu
NAN.K. Ankah
N.K. Ankah
WSW.O. Soboyejo
W.O. Soboyejo

22 April 2025 in Applications in Engineering Science
Verified
Journal Article
Open access
Desmond KlenamDesmond Klenam
Desmond Klenam
FMF. McBagonluri
F. McBagonluri
TAT.K. Asumadu
T.K. Asumadu
SOS.A. Osafo
S.A. Osafo
MBM.O. Bodunrin
M.O. Bodunrin
WSW.O. Soboyejo
W.O. Soboyejo

1 March 2023 in Coatings
Verified
Journal Article
Open access
PDF file
Desmond KlenamDesmond Klenam
Desmond Klenam
TATabiri Asumadu
Tabiri Asumadu
Michael Oluwatosin BodunrinMichael Oluwatosin Bodunrin
Michael Oluwatosin Bodunrin
MVMobin Vandadi
Mobin Vandadi
TBTrevor Bond
Trevor Bond
WSWinston Wole Soboyejo
Winston Wole Soboyejo
Complex concentrated alloys (CCAs) are structural and functional materials of the future with excellent mechanical, physical, and chemical properties. Due to the equiatomic compositions of these alloys, cost can hinder scalability. Thus, the development of CCA-based coatings is critical for low-cost applications. The application of cold spray technology to CCAs is in its infancy with emphasis on transition elements of the periodic table. Current CCA-based cold spray coating systems showed better adhesion, cohesion, and mechanical properties than conventional one-principal element-based alloys. Comprehensive mechanical behavior, microstructural evolution, deformation, and cracking of cold spray CC-based coatings on the same and different substrates are reviewed. Techniques such as analytical models, finite element analysis, and molecular dynamic simulations are reviewed. The implications of the core effects (high configurational entropy and enthalpy of mixing, sluggish diffusion, severe lattice distortion, and cocktail behavior) and interfacial nanoscale oxides on the structural integrity of cold spray CCA-based coatings are discussed. The mechanisms of adiabatic heating, jetting, and mechanical interlocking, characteristics of cold spray, and areas for future research are highlighted.

8 June 2021 in Corrosion Reviews
Verified
Journal Article
Closed access
Desmond KlenamDesmond Klenam
Desmond Klenam
MBMichael O. Bodunrin
Michael O. Bodunrin
SAStefania Akromah
Stefania Akromah
EGEmmanuel Gikunoo
Emmanuel Gikunoo
AAAnthony Andrews
Anthony Andrews
FMFred McBagonluri
Fred McBagonluri
An overview of the characterisation of rust by colour is presented. Each distinct rust colour is caused by atmospheric impurities, high or low moisture content and high or low oxygen environment over time. Yellow rust is mainly due to the high moisture environment over a period of time, which drips. Brown rust is dry, crusty and due to water and oxygen contact with localised patches on component surfaces. Black rust, the most stable form, occurs in low moisture and low oxygen environment. The rust residue shows where the reaction started, especially in contact with chlorides. The causative factors of red rust are atmospheric and similar to black rust in a chloride-containing environment. The effect of packaging, manufacturing and environmental factors on rust colour is briefly discussed. Visual characterization of rust could pre-empt root causes and analytical tools for validation. The limitations of these concepts are mentioned and directions for future research highlighted.
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23 November 2021 in Manufacturing Review
Verified
Journal Article
Open access
PDF file
Desmond KlenamDesmond Klenam
Desmond Klenam
GOGabriel Seun Ogunwande
Gabriel Seun Ogunwande
TOTaiwo Omotosho
Taiwo Omotosho
BOBlessing Ozah
Blessing Ozah
NMNthabiseng Beauty Maledi
Nthabiseng Beauty Maledi
Michael Oluwatosin BodunrinMichael Oluwatosin Bodunrin
Michael Oluwatosin Bodunrin
An overview of welding methods and process parameters and its effects on mechanical behaviour and structural integrity of magnesium and its alloys are discussed. These alloys are less dense and beneficial structural alloys for improved energy efficiency, eco-friendliness and driver of circular economic model for sustainable design and innovative ecosystem. While the application of Mg-alloys is projected to increase, understanding the mechanical behaviour and structural integrity of welded joints are critical. Thus, fusion and solid-state welding processes of these alloys are discussed with emphasis on mechanical characterization. Laser welding is the most effective fusion welding technique for most Mg alloys whereas, the predominant solid-state method is friction stir welding. The importance of process variables such as heat inputs, welding velocity (speed) and post weld treatments on the microstructural evolution, on mechanical and physical properties of the distinct zones of the weld joints are described. The weldment is the most susceptible to failure due to phase transformation, defects such as microporosity and relatively coarse grain sizes after solidification. The implication of the design of quality weld joints of Mg alloys are explored with areas for future research directions briefly discussed.
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