نتایج جستجو برای: acid corrosion

تعداد نتایج: 776320  

2004
L. Kumosa D. Armentrout M. Kumosa

The purpose of this work is to establish the critical surface conditions leading to the initiation of stress corrosion cracks on the as supplied surfaces of three unidirectional Eglass/polymer composites with modified polyester, epoxy and vinyl ester resins subjected to a nitric acid solution without mechanical loads. The composite materials considered in this study are commonly used in composi...

Journal: :Materials Research-ibero-american Journal of Materials 2021

The use of natural additives in biodiesel has been investigated, however, there is limited information the literature relation to their influence on corrosion resistance and oxidative stability. This work aims investigate stability carbon steel (AISI 1020) contact with soybean solutions (B100) presence absence such as: rosmarinic acid, curcumin, gingerol, eugenol, thymol quercetin. Corrosion mi...

2014
Alena Sicakova Adriana Estokova

Although properly made concrete is inherently a durable material, there are many physical and chemical forces in the environment which can contribute to its deterioration. This paper deals with two aspects of concrete durability in chemical aggressive environment: degradation effect of particular aggressive exposure and role of particular mineral additives. Results of the study of leaching and ...

In this investigation, attempts were directed to study the inhibitive effects of nitrite and phosphate base inhibitors for the carbon steel alloy samples, which are used in an acid gas treatment process (The SULFIRAN® solution), in Fe-EDTA solution. Electrochemical techniques, i.e. polarization curves and electrochemical impedance spectroscopy (EIS), were used to evaluate the inhibition efficie...

2010
Masahiro Seo Ryusaburo Furuichi Norio Sato

It has been considered that the corrosion of passive metals and alloys is not caused by the active metal-dissolution but the dissolution of a nonporous passive oxide film in aqueous solution. The corrosion current density of iron(1)(2), chromium(3) and their alloys(4) is independent of the potential in all the range of passivity, although depending upon the pH of solution. Vetter(1) explained s...

2017

The corrosion definition is not constrained to alloy and metals, but rather the term, corrosion, can likewise be stretched out to earthenware production and other nonmetallic materials. Corrosion can prompt to problems significant in furthest fields for man-factory [1]. Corrosion gets to be distinctly a standout amongst the most difficult points for researchers and the society for building. Fro...

Journal: :Entropy 2016
Chun-Huei Tsau Po-Yen Lee

This paper investigates the microstructures and the polarization behaviors of Al7.5Cr22.5Fe35Mn20Ni15 high-entropy alloy in 1M (1 mol/L) deaerated sulfuric acid (H2SO4), nitric acid (HNO3), and hydrochloric acid (HCl) solutions at temperatures of 30–60 ̋C. The three phases of the Al7.5Cr22.5Fe35Mn20Ni15 high-entropy alloy are body-centered cubic (BCC) dendrites, face-centered cubic (FCC) interd...

2003
Brian D. Chambers S. Ray Taylor

ii DISCLAIMER The contents of this report reflect the views of the authors, who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, s...

1999
R. L. Howard

This study has investigated the solubility of inhibiting pigments and also the leaching behaviour of corrosion inhibitors from a polyester binder in an acid rain solution. This study has relevance to the control of cut-edge corrosion by inhibitor pigments, which are incorporated into the primer coatings of coil-coated architectural cladding. The concentrations of leachate solutions in tubes glu...

2017
R. S. Abdel Hameed A. H. Shamroukh

3-Methyl-1-phenyl-1,5-dihydro-pyrazolo[3,4-d]pyrimidine-4-thione was prepared and used as a key compound for the preparation of some S-acyclic nucleosides of pyrazolo[3,4d]pyrimidine-thiones. Furthermore, the corrosion inhibitions of the prepared compounds towards carbon steel corrosion by 1.0 M hydrochloric acid were evaluated by chemical and electrochemical methods. The effect of inhibitors c...

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