scholarly journals Improving the properties of mild steel by ternary multilayer composite coating via electrodeposition route

2017 ◽  
Vol 30 (3) ◽  
pp. 449 ◽  
Author(s):  
O. S.I. Fayomi ◽  
A. P.I. Popoola ◽  
T. Monyai
2011 ◽  
Vol 674 ◽  
pp. 71-80 ◽  
Author(s):  
Jerzy Smolik ◽  
Adam Mazurkiewicz

The new hybrid technology is a combination of electron beam evaporation and arcevaporation processes, enabling the creation of the anti-erosion multilayer composite coating Ni/Cr- Cr3C2 with different volume of Cr3C2 filling in soft Ni/Cr matrix. The soft matrix made of Ni/Cr alloy and hard filling of Cr3C2 are created at the same time and directly during the electron beam and arc-evaporation process. Changes of the parameters of the hybrid process, i.e. pressure, current of arc discharge and substrate bias voltage Ubias, make it possible to control the volume of Cr3C2 and are a factor in filling the soft Cr/Ni matrix with carbides Cr3C2. With the use of the developed surface treatment hybrid technology, the multilayer composite coating Ni/Cr-Cr3C2 were obtained. For all composite layers created, the material properties, such as morphology, phase and chemical compositions, hardness, and Young modulus were investigated. The paper presents the original technological equipment, methodology, and technological parameters for the creation of the composite coating Ni/Cr-Cr3C2.


2018 ◽  
Vol 36 (12) ◽  
pp. 1278-1284 ◽  
Author(s):  
Tengfei Han ◽  
Meng Xiao ◽  
Jie Zhang ◽  
Xiaomei Feng ◽  
Yifu Shen

2005 ◽  
Vol 40 (18) ◽  
pp. 5087-5089 ◽  
Author(s):  
S. Das ◽  
S. Ghosh ◽  
A. Pandit ◽  
T. K. Bandyopadhyay ◽  
A. B. Chattopadhyay ◽  
...  

2013 ◽  
Vol 871 ◽  
pp. 164-170 ◽  
Author(s):  
A.A. Vereschaka ◽  
A.S. Vereschaka ◽  
A.I. Anikeev

The problem of increasing performance of carbide too lin machining hard-to-machine materials has been studied. Composite material was developed comprising carbide with heat-resistant bond Co-Re, significantly increasing resistance of carbide to thermoplastic deformation, and nanodispersed multilayer composite coating, significantly reducing thermomechanical impact on cutting part of tool.Studies to find the performance of tool made of developed composite material in turning hardened steel40H and heat-resistant nickel alloy HN77TYUR have shown its superiority compared to commercial carbides with coatings of modern generation.Studies have found out practicability of using VRK-13 cobalt-rhenium carbides with reduced content of expensive rhenium from 9% (weight) Re to 6% (weight), and it is highly competitive by heat resistance with VRK-15 carbide and is significantly superior to it by its strength.Results of cutting properties research forultra-dispersed Re-added WC-Co-carbides with Ti-TiN-TiCrAlNnano-dispersed multilayer composite coating are presented at longitudinal turning of constructional steels and hard-to-machine alloys. It is shown that the combination of ultra-dispersedheat-resistant WC-(Co,Re)-carbides and wear-resistant Ti-TiN-TiCrAlN coatings increase cutting properties of tool in some times.


2020 ◽  
Vol 5 (4) ◽  
pp. 429-435
Author(s):  
Sandra Viveros ◽  
Carmina Menchaca ◽  
Miguel A. Hernandez ◽  
Alba Covelo ◽  
Jorge Uruchurtu

Acrylonitrile-butadiene-styrene (ABS) is a common waste polymer by-product from industry. Outdated medicines are usually discarded and could be a valuable asset for other applications such as metallic corrosion inhibition. The aims of the present work is to manufacture a recycled ABS polymer doped with outdated lansoprazole medicament as a corrosion protection composite coating. It was applied to mild steel and immersed in chloride solution, and evaluate its possible corrosion protection properties using different electrochemical techniques. The manufactured coating presents good corrosion protection properties showing an 80% efficiency as a function of time of immersion in the aggressive solution.


2018 ◽  
Vol 145 ◽  
pp. 26-34 ◽  
Author(s):  
Pan Ren ◽  
Yingfei Yang ◽  
Wei Li ◽  
Shenglong Zhu ◽  
Fuhui Wang

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