Influence of Heat Treatment on the Corrosion Behaviour of Aluminium Silver Nano Particle/Calcium Carbonate Composite

Corrosion is one of the leading sources of material failure and deterioration in society. Scholars have proposed different techniques to mitigate corrosion. This research study explores and validates one of these techniques. An Aluminium metal matrix (AMC) was produced using the stir casting method with various weight percentages of AgNp and CaCO3 reinforcements. Heat treatment was performed on the samples to enhance the metallurgical and corrosion properties of the materials. The corrosion rate of the AMC samples was tested in different corrosive media (neutral and acidic) with different concentrations using the weight loss analysis technique for several days. It was observed that the corrosion rate of the AMC relies on the nature of the electrolyte and the percentage concentration of this electrolyte. The heat treatment improves the corrosion resistance of the AMC samples. In addition, an increase in the % weight composition of the reinforcement (AgNp + CaCO3) results in a reduction in the corrosion rate of the AMC in both corrosive media. The optimal %weight composition was found to be 4% for the hybrid reinforcement of AgNp + CaCO3 and 6% for the CaCO3 reinforcement in both the untreated and heat-treated samples.

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Investigation of the Microstructure and Bio-Corrosion Behaviour of Mg-Zn and Mg-Zn-Ca Alloys

Materials Science Forum ◽

10.4028/www.scientific.net/msf.765.788 ◽

2013 ◽

Vol 765 ◽

pp. 788-792 ◽

Cited By ~ 1

Author(s):

Yu Lu ◽

Andrew Bradshaw ◽

Yu Lung Chiu ◽

Ian Jones

Keyword(s):

Heat Treatment ◽

Corrosion Rate ◽

Magnesium Alloys ◽

Biomedical Applications ◽

Corrosion Behaviour ◽

Essential Elements ◽

Alloying Elements ◽

Unique Combination ◽

Corrosion Performance ◽

Corrosion Properties

Biomedical applications of magnesium alloys have attracted increasing attention due to their unique combination of advantages. However, the poor corrosion resistance is an obstacle to magnesium alloys being used as biodegradable materials. As zinc (Zn) and calcium (Ca) are non-toxic and recognized as nutritionally essential elements in the human body, in this study Zn and Ca were selected as alloying elements to produce suitable bio-corrosion properties. The grain size was reduced significantly from 141.4 μm to 97.3 μm by adding Ca. The bio-corrosion performance of the two alloys (Mg-3Zn and Mg-3Zn-0.3Ca) was characterized using immersion tests in simulated body fluid at 37 °C. The alloys were dominated by pitting corrosion. Heat treatment was used to alter the microstructure and influence further the corrosion rate. The correlation between microstructure and bio-corrosion rate was evaluated, in the light of the alloying elements and the heat treatment employed.

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Effect of homogenization temperature and soaking time on the microstructure and corrosion properties of a twin roll casted AA3003

CORROSION ◽

10.5006/3813 ◽

2021 ◽

Author(s):

Donovan Verkens ◽

Reynier Revilla ◽

Mert Günyüz ◽

Cemil Işıksaçan ◽

Herman Terryn ◽

...

Keyword(s):

Heat Treatment ◽

Corrosion Resistance ◽

Heat Exchangers ◽

Corrosion Behaviour ◽

Life Time ◽

Homogenization Temperature ◽

Corrosion Properties ◽

Cross Sectional ◽

The Impact ◽

Twin Roll

The AA3003 alloy is widely used as fin material in heat exchangers. The life time of these heat exchangers is mostly determined by their corrosion properties. Twin roll casting (TRC) of AA3003 material is known to often result in the formation of a macrosegregation area of alloying elements towards the centre plane of the casted strip (centre line segregation = CLS). Considering the potential exposure of cross-sectional areas of TRC material in the heat exchanger fin application, and the relatively high corrosion susceptibility of the CLS, the study of this region is of key importance to understand the microstructural effects on the resulting corrosion mechanisms and kinetics for these materials. Typically the alloys are homogenized to bring the microstructures closer to an equilibrium state, but the impact of this heat treatment on the corrosion properties is insufficiently studied. Therefore, this study investigates the effect of different homogenization procedures on the corrosion properties of the CLS and the interaction of the intermetallic particles with the surrounding aluminium matrix. This work shows that the pitting corrosion resistance is greatly dependent on the homogenization temperature, with better corrosion resistance obtained with higher temperature, especially near the CLS. This difference in corrosion behaviour is completely attributed to a difference in microstructure and not to an oxide layer effect. Furthermore, it is observed that not only temperature will have a large influence on the corrosion resistance, but duration of the heat treatment as well.

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Effect of heat treatment on microstructure and corrosion resistance of extruded ZK80 Mg alloy

Materials Express ◽

10.1166/mex.2019.1585 ◽

2019 ◽

Vol 9 (9) ◽

pp. 1092-1099

Author(s):

Fenghong Cao ◽

Chang Chen ◽

Zhenyu Wang

Keyword(s):

Heat Treatment ◽

Corrosion Resistance ◽

Corrosion Rate ◽

Aging Time ◽

Room Temperature ◽

Aging Treatment ◽

Corrosion Process ◽

Corrosion Mechanism ◽

Nacl Solution ◽

Corrosion Properties

The corrosion characteristics and corrosion mechanism of the extruded ZK80 alloy with different states soaking in 3.5% NaCl solution at room temperature were analyzed via OM, SEM, EDS, XRD and static weightlessness method and other experimental analysis methods. The results show that when the aging temperature is constant, and the corrosion rate decreases with the lengthen of aging time, while when the corrosion time is constant, the corrosion rate increases with the increase in aging time. Appropriate aging treatment not only refines the grain of the alloy, but also precipitates the Mg–Zn phase which can effectively prevent the corrosion process and improve the anti-corrosion properties of the alloy. The main corrosion characteristics of the alloy are filamentary corrosion and pitting corrosion.

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Galvanic Corrosion Behaviour of Different Types of Coatings Used in Safety Systems Manufacturing

Coatings ◽

10.3390/coatings11121542 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1542

Author(s):

Diana-Petronela Burduhos-Nergis ◽

Dumitru-Doru Burduhos-Nergis ◽

Costica Bejinariu

Keyword(s):

Corrosion Resistance ◽

Carbon Steel ◽

Corrosion Behaviour ◽

Galvanic Corrosion ◽

Worker Safety ◽

Corrosion Properties ◽

Corrosive Media ◽

Fire Extinguishing ◽

Different Types ◽

Corrosive Environments

Worker safety is one of the main aspects to be taken into account in any activity carried out at work. When we talk about the safety of the worker at activities carried out at height, the condition and characteristics of the personal protective equipment against falling from a height are one of the main causes of work accidents resulting in serious injuries or death. Carabiners are the main components of the safety system; their role is to connect the other components of the system or to make the connection between the system and the anchor point. Therefore, to be used safely, the carabiners’ material must have high corrosion resistance in different environments. This paper is part of a complex study that aims to improve the corrosion properties of carbon steel used in the manufacture of carabiners. Previous studies have shown that the corrosion resistance of carbon steel in various corrosive environments has been improved by the deposition of different types of phosphate layers, as well as other subsequently deposited layers. The aim of this paper is to study the galvanic corrosion evaluation between different galvanic couples (duralumin-coated samples, aluminium bronze-coated samples, and carbon steel-coated samples) tested in three different corrosive media. Moreover, the study approaches for the first time the galvanic corrosion of systems that can be formed between the materials used in the manufacture of carabiners. Accordingly, it was observed that, overall, the samples coated with a Zn phosphate layer exhibited the best performance in all the corrosive environments (saltwater and fire extinguishing solution).

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The influence of deformation on the corrosion properties of the material

Koroze a ochrana materialu ◽

10.1515/kom-2017-0009 ◽

2017 ◽

Vol 61 (3) ◽

pp. 86-90 ◽

Cited By ~ 1

Author(s):

M. Nováková ◽

O. Chocholatý ◽

A. Kříž

Keyword(s):

Corrosion Rate ◽

Tensile Stress ◽

Electric Current ◽

Polarization Resistance ◽

Corrosion Potential ◽

Corrosion Behaviour ◽

Corrosion Properties ◽

Titanium Grade ◽

Changes Over Time ◽

Over Time

Abstract This work was focused on changes of corrosion behaviour influence of deformation. The This work focuses on changes in corrosion behaviour under the influence of deformation. The main purpose is to observe the changes caused by tensile stress. The experimental material used is steel 1.4301 and titanium GRADE 2. The measurements were carried out using a potentiostat, which measures potential changes over time and electric current. The electrolyte used was 3.5% NaCl. Corrosion properties, especially polarization resistance, corrosion potential and corrosion rate, were evaluated from the measurements. The results demonstrate the changing corrosion properties depending on deformation. The corrosion properties worsened as the deformation increased.

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Effect of Heat Treatment on the Mechanical and Corrosion Properties of Mg–Zn–Ga Biodegradable Mg Alloys

Materials ◽

10.3390/ma14247847 ◽

2021 ◽

Vol 14 (24) ◽

pp. 7847

Author(s):

Viacheslav Bazhenov ◽

Anastasia Lyskovich ◽

Anna Li ◽

Vasily Bautin ◽

Alexander Komissarov ◽

...

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Corrosion Rate ◽

Orthopedic Implants ◽

Mg Alloys ◽

Medical Implants ◽

Corrosion Properties ◽

Treatment Regimens ◽

Mechanical And Corrosion Properties ◽

Potential Use

Mg alloys have mechanical properties similar to those of human bones, and have been studied extensively because of their potential use in biodegradable medical implants. In this study, the influence of different heat treatment regimens on the microstructure and mechanical and corrosion properties of biodegradable Mg–Zn–Ga alloys was investigated, because Ga is effective in the treatment of disorders associated with accelerated bone loss. Solid–solution heat treatment (SSHT) enhanced the mechanical properties of these alloys, and a low corrosion rate in Hanks’ solution was achieved because of the decrease in the cathodic-phase content after SSHT. Thus, the Mg–4 wt.% Zn–4 wt.% Ga–0.5 wt.% Y alloy after 18 h of SSHT at 350 °C (ultimate tensile strength: 207 MPa; yield strength: 97 MPa; elongation at fracture: 7.5%; corrosion rate: 0.27 mm/year) was recommended for low-loaded orthopedic implants.

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The Effect of Heat Treatment on Microstructure, Microhardness and Pitting Corrosion of Ti6Al4V Produced by Electron Beam Melting Additive Manufacturing Process

10.21203/rs.3.rs-1071502/v1 ◽

2021 ◽

Author(s):

Mingzhen Xiu ◽

Yong Teck Tan ◽

Srinivasan Raghavan ◽

Min Hao Goh ◽

Mui Ling Sharon Nai

Keyword(s):

Heat Treatment ◽

Corrosion Resistance ◽

Electron Beam ◽

Pitting Corrosion ◽

Corrosion Behaviour ◽

Corrosion Properties ◽

Clear Trend ◽

Pitting Potential ◽

Pitting Corrosion Resistance ◽

Lath Width

Abstract There has been limited studies on corrosion behaviour of post-processed Electron Beam Melted (EBM) Ti6Al4V, given that the factors affecting corrosion resistance of AM Ti6Al4V remain unclear. This paper proposes using heat treatment method to improve the pitting corrosion resistance of EBM Ti6Al4V. Different treatment profiles alter the microstructure of EBM Ti6Al4V. A clear trend is observed between microhardness and α lath width. As-printed EBM Ti6Al4V exhibits an inferior pitting potential, while heat treatment provided a significant improvement in the corrosion resistance. This study finds that the β phase fraction is a better indicator than the α lath width for pitting corrosion resistance. Solution air-cooled & ageing heat treated EBM Ti6Al4V exhibits good mechanical and corrosion properties, and even performs better than commercial cast Ti6Al4V.

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Corrosion Behaviour of Automotive Steel Sheets Depending on the Degree of Deformation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.635.57 ◽

2014 ◽

Vol 635 ◽

pp. 57-60 ◽

Cited By ~ 1

Author(s):

Janette Brezinová ◽

Juraj Koncz ◽

Miroslav Tomáš ◽

Ján Slota

Keyword(s):

Corrosion Rate ◽

Steel Sheet ◽

Electrochemical Impedance ◽

Corrosion Behaviour ◽

Experimental Studies ◽

Corrosion Monitoring ◽

Corrosion Properties ◽

Degree Of Deformation ◽

Steel Sheets ◽

Automotive Steel

This paper presents the results of research aimed to measuring the corrosion properties of automotive steel sheets. The degree of deformation influence to the corrosion properties of the steel sheet for car body parts has been proven by the modern methods of corrosion monitoring such as Electrochemical Impedance Spectroscopy. Corrosion rate was assessed using electrochemical methods in 0.1 M solution of NaCl. Experimental studies have pointed out if degree of deformation increases the corrosion rate of the steel sheet increases as well.

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Corrosion Behaviour of High-Strength Al 7005 Alloy and Its Composites Reinforced with Industrial Waste-Based Fly Ash and Glass Fibre: Comparison of Stir Cast and Extrusion Conditions

Materials ◽

10.3390/ma14143929 ◽

2021 ◽

Vol 14 (14) ◽

pp. 3929

Author(s):

Praveen Kumar Swamy ◽

Shantharaja Mylaraiah ◽

Manjunath Patel Gowdru Chandrashekarappa ◽

Avinash Lakshmikanthan ◽

Danil Yurievich Pimenov ◽

...

Keyword(s):

Fly Ash ◽

Corrosion Rate ◽

Electrochemical Impedance ◽

Corrosion Behaviour ◽

Research Work ◽

Glass Network ◽

High Strength ◽

Stir Casting ◽

Extrusion Process ◽

Industrial Wastes

The stringent demand to develop lightweight materials with enhanced properties suitable for various engineering applications is the focus of this research work. Industrial wastes such as fly ash (FA) and S-glass-fibres (GF) were used as reinforcement materials for high-strength alloy, i.e., Al 7005. Stir casting routes were employed for fabricating the four samples, Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA. The extrusion process with different extrusion ratios (ER: 5.32:1, and 2.66:1) was used to examine the properties of all four samples. Extruded samples with ER: 5.32: 1 resulted in equiaxed grains with refined structure compared to stir casting parts. The effect of the extrusion process and the addition of reinforcements (GF and FA) on the gravimetric, electrochemical, and electrochemical impedance corrosion behaviour of Al 7005 composites in 1M HCl (Hydrochloric acid) solution were investigated. The results of all three corrosion methods showed that Al 7005 + 6% FA exhibited higher corrosion resistance. Corrosion rate of Al 7005, Al 7005 + 5% GF, Al 7005 + 6% FA and Al 7005 + 5% GF + 6% FA is found equal to 3.25, 2.41, 0.34, and 0.76 mpy, respectively. The FA particles remain inert and act as a physical barrier with corrosive media during the corrosion test. GF undergoes fibre degradation or disrupts the continuity of the glass network as a result of fibre leaching, which increases the corrosion rate in the sample. The gravimetric study showed that the corrosion rates decreased with an increase in extrusion ratio, which might be due to corrosion passivation increases and improved properties. The scanning electron microscopy reveals that corrosion fits, flakes and micro-cracks were observed more in the as-cast composites than that of extrusion composites, promoting the corrosion rate.

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Corrosion Behaviour of High Pressure Die-Cast and Semi-Solid Cast AZ91, AM60 and AM50 Alloys

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.192-193.231 ◽

2012 ◽

Vol 192-193 ◽

pp. 231-237 ◽

Cited By ~ 3

Author(s):

Simone Umberto Mariani ◽

Anna da Forno ◽

Massimiliano Bestetti

Keyword(s):

Heat Treatment ◽

High Pressure ◽

Corrosion Resistance ◽

Open Circuit Potential ◽

Corrosion Behaviour ◽

Open Circuit ◽

Corrosive Media ◽

Die Cast ◽

Cast Alloys ◽

Semi Solid

A comparison of corrosion resistance of die-cast and semi-solid cast AZ91, AM60 and AM50 magnesium alloys was performed in different corrosive media by measurement of the open circuit potential, potentiodynamic scans and weight loss tests. Before testing, a heat treatment was carried out onto semi-solid cast alloys. Electrochemical measurements have shown that the semi-solid cast alloys have a different corrosion rate compared to the die-cast ones. The results could be correlated to the different microstructures of the samples produced by the different processes.

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