Author
Zhenlan Quan
Bio: Zhenlan Quan is an academic researcher from Shandong University. The author has contributed to research in topics: Erosion corrosion of copper water tubes & Copper. The author has an hindex of 6, co-authored 8 publications receiving 577 citations.
Papers
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TL;DR: In this article, a probable reaction mechanism is proposed to interpret theoretically how hydrogen sulfide inhibits the corrosion of iron, which is attributed to formation of ferrous sulfide (FeS) protective film on the electrode surface.
428 citations
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TL;DR: In this article, self-assembled (SA) films of Schiff base were prepared on the copper surface and the corrosion protection abilities of SA films in chloride solution were evaluated using electrochemical impedance spectroscopy and polarization curves.
68 citations
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TL;DR: In this paper, the corrosion protection of self-assembled films derived from Schiff bases, including N-2-hydroxyphenyl-(3methoxy-salicylidenimine) (V-bso), N 2 -hydroxymhenyl (S-Bso) and N,N′-o-phenylen-bis (S -S-O-ph-S), on copper surfaces have been probed by electrochemical techniques in an aqueous electrolyte.
57 citations
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TL;DR: Self-assembled monolayers (SAM) of Schiff base N,N′-o-phenylen-bis(3-methoxysalicylaldenimine), designated as Vo-Ph-V, and N-2-hydroxyphenyl-(3mETHoxys alicylidenimine) designated asV-b... as mentioned in this paper.
Abstract: Self-assembled monolayers (SAM) of Schiff base N,N′-o-phenylen-bis(3-methoxysalicylaldenimine), designated as V-o-Ph-V, and N-2-hydroxyphenyl-(3-methoxysalicylidenimine), designated as V-b...
43 citations
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TL;DR: In this article, self-assembled monolayers of a Schiff base were prepared on a copper surface under different conditions, and the quality and protection ability of resulting films against aqueous corrosion of copper were evaluated by alternating current (AC) impedance technique.
Abstract: Self-assembled monolayers (SAM) of a Schiff base were prepared on a copper surface under different conditions, and the quality and protection ability of resulting films against aqueous corrosion of copper were evaluated by alternating current (AC) impedance technique. Some factors, including surface treatment and applied potentials during and after self-assembly, were investigated. The results indicate that nitric acid (HNO3) etching of the copper prior to adsorption can improve the quality and corrosion inhibition ability of SAM significantly. An appropriately applied potential during self-assembly contributed to the improvement of the quality of SAM, and the long hydrocarbon chain in the molecular structure of the Schiff base enhanced the protection of SAM. Fourier transform infrared (FTIR) reflection spectroscopy and x-ray photoelectron spectroscopy (XPS) were used in the analysis of SAM.
18 citations
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TL;DR: This brief review traces the historical twists in the perception of SRB-induced corrosion, considering the presently most plausible explanations as well as possible early misconceptions in the understanding of severe corrosion in anoxic, sulfate-rich environments.
Abstract: About a century ago, researchers first recognized a connection between the activity of environmental microorganisms and cases of anaerobic iron corrosion. Since then, such microbially influenced corrosion (MIC) has gained prominence and its technical and economic implications are now widely recognized. Under anoxic conditions (e.g., in oil and gas pipelines), sulfate-reducing bacteria (SRB) are commonly considered the main culprits of MIC. This perception largely stems from three recurrent observations. First, anoxic sulfate-rich environments (e.g., anoxic seawater) are particularly corrosive. Second, SRB and their characteristic corrosion product iron sulfide are ubiquitously associated with anaerobic corrosion damage, and third, no other physiological group produces comparably severe corrosion damage in laboratory-grown pure cultures. However, there remain many open questions as to the underlying mechanisms and their relative contributions to corrosion. On the one hand, SRB damage iron constructions indirectly through a corrosive chemical agent, hydrogen sulfide, formed by the organisms as a dissimilatory product from sulfate reduction with organic compounds or hydrogen ("chemical microbially influenced corrosion"; CMIC). On the other hand, certain SRB can also attack iron via withdrawal of electrons ("electrical microbially influenced corrosion"; EMIC), viz., directly by metabolic coupling. Corrosion of iron by SRB is typically associated with the formation of iron sulfides (FeS) which, paradoxically, may reduce corrosion in some cases while they increase it in others. This brief review traces the historical twists in the perception of SRB-induced corrosion, considering the presently most plausible explanations as well as possible early misconceptions in the understanding of severe corrosion in anoxic, sulfate-rich environments.
566 citations
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TL;DR: In this paper, two newly synthesised Schiff bases [H2A3, N,N′-ortho-phenylene(salicylaldimine-acetylacetone imine) and H2A4 were studied as inhibitors for the corrosion of mild steel in 0.5 mol dm-3 sulphuric acid.
407 citations
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TL;DR: In this paper, a macrocyclic polyether compounds containing a 1,3,4-thiadiazole moiety have been prepared to study the corrosion inhibitive effect of mild steel in normal hydrochloric acid solutions.
379 citations
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TL;DR: Tagetes erecta (Marigold flower) [TEE] has been evaluated as a corrosion inhibitor for mild steel in 0.5 M H2SO4 solution by means of gravimetric, potentiodynamic polarization and electrochemical impedance spectroscopic measurements as mentioned in this paper.
378 citations
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TL;DR: Potentiodynamic polarisation and ac impedance studies were carried out on the inhibition of carbon steel in 0.1-M hydrochloric acid solution by various Schiff bases containing heteroaromatic substituents as mentioned in this paper.
309 citations