Experimental Investigations of Aluminium Alloys 2024 –T 3 Form in Terms of Tribocorrosion Characteristics

Abstract

Results of" ball on disc" principle tests to examine the friction coefficient and wear rate of Aluminium Alloys 2024-T3 are presented. Tribocorrosion experiments were performed using a pin on disc tribometer under controlled electrochemical conditions in NaCl solution. This paper reviews the available knowledge relating to the tribocorrosion. Tribocorrosion can be defined as a degradation phenomenon of material surfaces (wear, cracking, corrosion, etc.) subjected to the combined action of mechanical loading (friction, abrasion, erosion, etc.) and corrosion attack caused by the environment (chemical and/or electrochemical interaction), as highlighted in Figure. Experimental confirmations of improving electrochemical properties of the aluminium alloy AW 2024 by anode oxidation and extension of the period of excitement AW 2024 after adjusting surface anode oxidation are documented.Keywords: tribology, corrosion, tribocorrosion, research, coatings, layers IntroductionThe need to select or design new surfaces for future equipment as well as minimize the operating costs and extend the life of existing machinery has led to demands for a much better understanding of surface degradation processes particularly when tribological components are operating in corrosive environments. This has given rise to the active research area of tribocorrosion which seeks to address the concerns above and understand the surface degradation mechanisms when mechanical wear and chemical or electrochemical processes interact with each other. Corrosion is the physicochemical interaction between metal and environment. Corrosion resulted in permanent chemical changes of metal and therefore metal changes his chemical, physical and mechanical properties [1,2]. Corrosion of the most technical metals is spontaneously because of metals tendency to achieve the thermodynamically stable state. Most of the technical metals (except copper, silver, gold and platinum) are no-noble and therefore it is presumption of interaction with environment in common conditions. It is very important to know the corrosion rate of the metal in specific media. The corrosion rate is the rate of the changing the metal to its corrosion product and it is determining by the rate of chemical reactions or by the rate of the transport of active components near metal surface. If the corrosion products are

Wear and Corrosion of Wrought A6061 Aluminium Alloy in DOT3 Brake Fluid

“…These failure modes are surface phenomena. They emanate at the surface and can swiftly lead to stress concentration, fracture, increased friction, and other problems caused by the formation of wear debris and corrosion products occurring on rubbing or impacting surfaces [1,2]. Hence there can be corrosion induced wear or wear aggravated corrosion [3] broadly categorized under the tribocorrosion.…”

“…This makes it to be alkaline and has strong potential to attack aluminium alloy components in the brake system. Studies have been widely reported on the subjects of wear, corrosion and tribocorrosion of different Al alloys [2][3][8][9][10][11]. Aluminium alloy wears have been accessed using tribometers, while their corrosions have been studied in diverse active and aggressive media (acid, base and alkali).…”

Tribological Research of Properties of Heat – Treated Cast Irons with Globular Graphite

“…A new experimental device a linear microtribometer is being used for evaluation of tribological properties at the Department of construction and engine parts. The testing is based on the method Ball-on-Plate, which is a standard method of tribological material properties testing [2][3][4]. The main part of a microtribometer is a tribological knot which consists of a ball (fixed on the end of a roller) and a flat sample in a shape of a plate.…”

“…The matrix consists of two phases -bainitic ferrite and stabilized austenite. The combination of these two phases in the structure of the matrix enables to reach good mechanical properties of this material [1,2]. HTDI is made of the cast iron with globular graphite by means of standard heat treatment (quenching and tempering).…”

Tribocorrosion properties of nanocrystalline W-rich Co–W, Ni–W and Fe–W coatings

“…Such samples with natural passivation ability are stable in corrosion media. In other words, the existence or rebuilding rate of the passivation layer after its damage determine the corrosion resistant of the metallic surface during tribocorrosion processes [1].…”