scholarly journals Effect of Magnesium Addition on Corrosion Resistance of Aluminum -17%Silicon Alloy

2017 ◽  
Vol 12 (4) ◽  
pp. 50-58
Author(s):  
Muna Khethier Abbass ◽  
Khairia Salman Hassan ◽  
Kayser Aziz Ameen
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Pitting Corrosion ◽  
Electrochemical Behavior ◽  
Die Casting ◽  
Corrosion Current ◽  
Nacl Solution ◽  
Magnesium Metal ◽  
Pitting Corrosion Resistance ◽  
Mg Content

The electrochemical behavior of Al-17%Si alloy is investigated in 3.5wt% NaCl solution. Many alloys with addition of the different wt% magnesium metal of  1wt%, 2%, 3wt% ,4.5wt% ,and 9wt% were prepared by gravity die casting . The microstructures of prepared alloys were examined by optical and SEM microscopes. Corrosion behavior was investigated by using potentiostat instrument under static potentials test and corrosion current was recorded to determine corrosion resistance of all prepared samples. It was found that the addition of Mg metal improves the corrosion resistance of Al-17%Si alloy in 3.5%NaCl solution. The alloy containing 1%Mg shows less corrosion rate than the others while the alloys containing 4.5%Mg, 9%Mg content have the better pitting corrosion resistance than other alloys.

scholarly journals The role of alloyed strontium in the microstructures and alkaline electrochemistry of Mg–5Al–4Sn alloys

RSC Advances ◽  
2020 ◽  
Vol 10 (57) ◽  
pp. 34387-34395
Author(s):  
Le Van Sy ◽  
Phan Minh Quoc Binh ◽  
Bhajan Lal ◽  
Quy Bau Nguyen ◽  
Tran Van Hung ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Die Casting ◽  
Pitting Corrosion Resistance

The development of Mg–5Al–4Sn–xSr alloys with α-grain reduction, refined precipitates and pitting corrosion resistance by die casting.

scholarly journals Evaluation of Corrosion Resistance in 3.5% NaCl Solution of Hybrid Coatings Obtained from Plastics Materials

2021 ◽  
Vol 58 (1) ◽  
pp. 201-209
Author(s):  
Alina Crina Muresan ◽  
Daniela Laura Buruiana ◽  
Gabriel Bogdan Carp ◽  
Sorin Berbece ◽  
Constantin Trus
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Disperse Phase ◽  
Phenol Formaldehyde ◽  
Corrosion Current ◽  
Phenol Formaldehyde Resin ◽  
Hybrid Coatings ◽  
Formaldehyde Resin ◽  
Nacl Solution ◽  
Plastic Materials

In this work, the corrosion resistance of hybrid coatings obtained from plastic materials was evaluated and compared with the corrosion resistance of Zn coatings. Zinc and hybrid coatings were obtained by electrodeposition from zinc sulphate electrolyte. For obtained hybrid coatings it was used as disperse phase two type of plastic materials: phenol-formaldehyde resin and epoxy resin. Polarization was used to measure the corrosion rate and behaviour of zinc and hybrid coatings in 3.5% NaCl solution. Tafel curves show that the including particles of plastic materials in zinc matrix disturbs the cathodic reactions and reduces anodic reaction leading to decrease of corrosion current and increase the corrosion resistance of hybrid coatings obtained at the same electrodeposition parameters as zinc coatings. Smallest values of corrosion rate were evaluated for hybrid coatings obtained with phenol-formaldehyde resin as disperse phase that indicates a good corrosion resistance in 3.5% NaCl solution.

Effect of tempering treatment on pitting corrosion resistance of modified cast CA6NM stainless steel in 3.5 % NaCl solution

2021 ◽  
Author(s):  
Vinda Puspasari ◽  
Mukhlis Agung Prasetyo ◽  
Arini Nikitasari ◽  
Efendi Mabruri ◽  
Moch. Syaiful Anwar
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Nacl Solution ◽  
Pitting Corrosion Resistance ◽  
Tempering Treatment

Pitting corrosion resistance of cast duplex stainless steels in 3.5%NaCl solution

2008 ◽  
Vol 59 (12) ◽  
pp. 1736-1740 ◽  
Author(s):  
A.M. do Nascimento ◽  
M.C.F. Ierardi ◽  
A.Y. Kina ◽  
S.S.M. Tavares
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Stainless Steels ◽  
Duplex Stainless Steels ◽  
Nacl Solution ◽  
Pitting Corrosion Resistance

scholarly journals Influence of Aging Heat Treatment on Pitting Corrosion Resistance of Martensitic Stainless Steel

2021 ◽  
Vol 17 (1) ◽  
pp. 20-33
Author(s):  
Abdullah Dhayea Assi
Keyword(s):  
Heat Treatment ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Corrosion Rate ◽  
Pitting Corrosion ◽  
Corrosion Test ◽  
Martensitic Stainless Steel ◽  
Aging Heat Treatment ◽  
Chemical Corrosion ◽  
Pitting Corrosion Resistance

In this research is to study the influence of the aging heat treatment on the pitting corrosion resistance of martensitic stainless steel (MSS), where a number of specimens from martensitic stainless steel were subjected to solution treatment at 1100 oC for one hour followed by water quenching then aging in the temperatures range (500-750) oC for different holding times (1,5,10,15&20) hr. Accelerated chemical corrosion test and immersion chemical corrosion test were performed on samples after heat treatment. The results of the research showed that the pitting corrosion resistance is significantly affected by the aging temperature. Where found that the aging samples at a temperature of 500 °C have the highest rate of corrosion which may be due to an increase in the ratio of the Delta type ferrite (δ-ferrite) and very soft precipitates from other phases of heterogeneous form in the basic martensitic phase; which leads to increased corrosion rate, whereas aging   samples in the temperature range (550–650) °C have the smaller rate of corrosion values, this is due to the high volumetric ratio of remaining austenite. The aging samples at temperatures above 650 °C show an average corrosion rate. It was also found that the type of pits resulting from both the chemical corrosion tests and their shape were not related to the ferrite type and the carbides present in the microstructure

NIROSTA 4429

Alloy Digest ◽  
2000 ◽  
Vol 49 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Pitting Corrosion ◽  
Intergranular Corrosion ◽  
Heat Treating ◽  
Low Carbon ◽  
High Nitrogen ◽  
Temperature Performance ◽  
Pitting Corrosion Resistance

Abstract Nirosta 4429 is a low-carbon, high-nitrogen version of type 316 stainless steel. The low carbon imparts intergranular corrosion resistance while the nitrogen imparts both higher strength and some increased pitting corrosion resistance. It is recommended for use as welded parts that need not or cannot be annealed after welding. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-787. Producer or source: ThyssenKrupp Nirosta.

Pitting Corrosion of Biomedical Titanium and Titanium Alloys: A Brief Review

2020 ◽  
Vol 16 ◽  
Author(s):  
Yu-Wei Cui ◽  
Liang-Yu Chen ◽  
Xin-Xin Liu
Keyword(s):  
Corrosion Resistance ◽  
Pitting Corrosion ◽  
Potential Temperature ◽  
Growth Stages ◽  
Factors Affecting ◽  
Ti Alloys ◽  
Pitting Corrosion Resistance ◽  
Superior Mechanical Properties ◽  
Good Biocompatibility ◽  
Main Factors

Abstract:: Thanks to their excellent corrosion resistance, superior mechanical properties and good biocompatibility, titanium (Ti) and Ti alloys are extensively applied in biomedical fields. Pitting corrosion is a critical consideration for the reliability of Ti and Ti alloys used in the human body. Therefore, this article focuses on the pitting corrosion of Ti and Ti alloys, which introduces the growth stages of pitting corrosion and its main influencing factors. Three stages, i.e. (1) breakdown of passive film, (1) metastable pitting, and (3) propagation of pitting, are roughly divided to introduce the pitting corrosion. As reviewed, corrosive environment, applied potential, temperature and alloy compositions are the main factors affecting the pitting corrosion of Ti and Ti alloys. Moreover, the pitting corrosion of different types Ti alloys are also reviewed to correlate the types of Ti alloys and the main factors of pitting corrosion. Roughly speaking, β-type Ti alloys have the best pitting corrosion resistance among the three types of Ti alloys.

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