Phosphate ester surface treatment for reduced wear and corrosion protection

Wear ◽  
1994 ◽  
Vol 173 (1-2) ◽  
pp. 207-217 ◽  
Author(s):  
Douglas G. Placek ◽  
Sundeep G. Shankwalkar
Author(s):  
R. Subasri

Surface cleaning and activation of substrates are two critical processes that affect the mechanical and corrosion resistance properties of protective coatings when deposited on the substrates. Surface cleaning removes the contaminants, for example, grease on the substrate, and surface activation introduces active bonds on the substrate thereby increasing the surface free energy. Conventionally, surface cleaning and activation of aluminum and its alloys are carried out by a wet chemical technique. A convenient and safe alternate to the wet chemical cleaning/activation would be to use plasma for the same purpose. Plasma surface pre-treatment greatly improves adhesion of coatings deposited, which is very vital for good corrosion protection and mechanical properties such as scratch and abrasion resistance. Cold and atmospheric air plasma treatments have been the most widely studied pre-treatments for Al alloys. This article will discuss the advancements in the use of plasma treatment on Al/Al alloys and its effect on corrosion resistance and mechanical properties of coatings deposited after the surface treatment.


2015 ◽  
Vol 365 ◽  
pp. 148-153 ◽  
Author(s):  
M.A. Doñu Ruiz ◽  
N. López-Perrusquia ◽  
G. Urriolagoitia-Sosa ◽  
Luis Héctor Hernández-Gómez ◽  
D. Sánchez Huerta

It is known that the diffusion of boron atoms on the surface of metals and alloys can increase the hardness, wear and corrosion resistance of engineering components. Boriding is an alternative method of sample treatment when the manual work required in powder boriding needs to be decreased. In addition, its advantage lies in high volumes of work and in selective treatments. Boron carbide consists of B4C (approximately 76 wt% boron). Using gases or powders as boronizing process gives rise to boride coatings constituted by an inner layer of Fe2B (hardness 15GPa) and an outer layer of FeB (hardness 25 GPa) [1,2]. Many industrial processes require the use of highly wear-resistant materials, tools steel, hot work being these basic Cr steels in applications such as extrusion dies for light alloys, matrices for pressing, forging dies and for molding plastic.


1995 ◽  
Vol 13 (3) ◽  
pp. 1202-1207 ◽  
Author(s):  
A. Matthews ◽  
A. Leyland ◽  
B. Dorn ◽  
P. R. Stevenson ◽  
M. Bin‐Sudin ◽  
...  

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 19181-19195 ◽  
Author(s):  
A. Madhan Kumar ◽  
M. A. Hussein ◽  
Akeem Yusuf Adesina ◽  
Suresh Ramakrishna ◽  
N. Al-Aqeeli

Surface treatment of metallic materials prior to the application of polymer coatings plays an important role in providing improved surface features and enhanced corrosion protection.


2008 ◽  
Vol 38 ◽  
pp. 14-26 ◽  
Author(s):  
Monica Trueba ◽  
Stefano P. Trasatti

An alternative approach was developed for surface treatment of as-received commercial AA 2024 T3 by using a pyrrole-based silane (SiPy). For film deposition, just one immersion step is enough, followed by curing. SiPy layer structure contains both polysiloxane bonds and pyrrole oligomers, with some degree of doping, giving a highly coherent layer. The superior film quality with respect to simple polysiloxane, is probably the main reason for the better corrosion performance obtained for SiPy on 2024.


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