Removal of perchlorate using either acid-washed zero-valent aluminum or aluminum hydroxide was studied in batch reactors under ambient temperature and pressure. Approximately 90-95% of perchlorate was removed within 24h in the presence of 35 g L(-1) aluminum at acidic pH (4.5+/-0.2). Although aluminum is a strong reductant, this study indicated no explicit evidence to support perchlorate reduct...

Aluminum based metal matrix composites (MMCs) have received considerable attention in the automotive, aerospace and nuclear industries. One of the main challenges using Al-based MMCs is the influence of the reinforcement particles on the corrosion resistance. In the present study, the corrosion behavior of Al-B₄C MMCs in a 3.5 wt.% NaCl solution were investigated using potentiodynamic polarizat...

Nowadays due to water shortage, the use of air humidity as the sustainable solution has been considered by cities located in coastal zones; especially in warm and humid climate. However, the use of air humidity also has its own problems such as corrosion of metal parts in photovoltaic cells that used for energy supplying and they are often made of Aluminum alloy. Therefore different methods suc...

A new technique was accepted to fill the porosity of Al coating applied by arc thermal spray process to enhance corrosion resistance performance in artificial ocean water. The porosity is the inherent property of arc thermal spray coating process. In this study, applied coating was treated with different concentrations of ammonium phosphate mono basic (NH4H2PO4: AP) solution thereafter dried at...

aluminum alloys such as al 5083 have primary potential for lightweight structural application in automotive and aerospace industries. this paper addresses the mechanical and tribological properties and corrosion resistance of chromium nitride coatings deposited on al 5083 that can be used for development of applications of aluminum 5083 alloy. the crn coatings of 1 μm thickness were deposited b...

Quantitative in-situ and localized analytical methods that can monitor Mg release are central to probe the impact of the microstructure on magnesium alloy corrosion. As such, a potentiometric micro-Mg ion-selective membrane electrode is fabricated, calibrated, characterized and used to selectively monitor the Mg release from different cast Mg AM50 alloys during corrosion. We demonstrate that th...

Fluctuation electron microscopy studies have been performed on several aluminum oxides exposed to different electrochemical conditions. Little is known about amorphous aluminum oxide structures and their relationship with their passivation behaviors. Corrosion studies have shown that exposure of aluminum oxide films to Cl ions in solution reduces the oxide's passivity, and this results in the o...

The electrochemical behavior and the corrosion rate of aluminum electrode have been evaluated in different pH solutions in absence and presence of aggressive anion, using open-circuit potential measurements and potentiodynamic polarization technique. Also, the corrosion inhibiting effects of ortho, meta and para toludine in a solution of pH4 containing 0.1M sodium chloride was investigated usin...

L. Bernat, Poznan University of Technology, Faculty of Mechanical Engineering and Management, Division of Foundry, Poznan, Poland The paper presents an influence of the Dendrite Arm Spacing (DAS) microstructure parameter on the intergranular corrosion of AlSi7Mg aluminum alloy. The samples were subjected to the corrosion process for: 2,5; 12; 24; 48 and 96 hours in NaCl + HCl + H2O solution. It...

The purpose of this paper is to investigate the inhibition effect of some Chalcone derivatives on the corrosion behavior of aluminum in 1 M phosphoric acid solutions with and without Chalcone derivatives and to investigate the influence of halide additives namely: KCl, KBr and KI on the inhibition efficiency of aluminum. For this purpose, polarization (DC) and weight loss measurements were used...