... accepted as the relevant underlying mechanism. Based on this understanding it was possible to identify the relevant processes with respect to AC and DC interference and explain the empirical observations. This led to the development of ISO 18086 and has significantly influenced the work on ISO/DIS 21857...

...Aria Kahyarian; Bruce Brown; Srdjan Nešić The recent developments in mechanistic understandings of mild steel corrosion in the presence of carboxylic acids, carbon dioxide, and hydrogen sulfide, when place side by side, reveal a simple, universal mechanism despite all the differences conventionally...

...Alberto Keitelman; M. Graciela Alvarez The localized acidification mechanism for stable pitting growth was the result of pitting research performed by many investigators, led by Galvele. The main point of the mechanism is that a localized pH drop on the anode surface is a necessary condition...

...Aria Kahyarian; Bruce Brown; Srdjan Nešić The mechanism of the cathodic reaction in acetic acid corrosion of iron and API X65 mild steel was investigated in mildly acidic sodium chloride electrolytes. The behavior of the charge transfer controlled currents in the steady state voltammograms showed...

...). Results of this laboratory study led to better understanding of the corrosion mechanisms operating on superheaters and reheaters in coal-fired boilers due to the coexistence of sulfur and chlorine in coal. A new corrosion mechanism, i.e., “active sulfide-to-oxide corrosion mechanism,” accounts...

... spectroscopy (EIS). The SCC mechanism of the X70 pipeline steel was found to be dependent on the range of applied potential, including anodic dissolution (AD), hydrogen embrittlement (HE), and the combination of AD and HE (AD+HE). The potential range for each mechanism can be determined by comparing...

... of the laboratory study indicate that a typical dual-layered scale was formed on the metal surface from simultaneous oxidation/sulfidation due to the presence of sulfur in coal. A new corrosion mechanism is proposed here as “active sulfidation” to account for the accelerated corrosion attack on furnace walls...

... describes the mechanism involved in this transition, and provides a basis for a more extensive study of the corrosion process encountered on switching between anaerobic and aerobic conditions. The overall goal of this study was to provide a mechanistic basis for the corrosion scenarios possible on gas...

... occur by corrosion and/or precipitation, while the layer damage can be by mechanical or chemical means. The model predictions were compared with a very broad set of experimental results and good agreement was found. The current version of the model does not yet include iron sulfide precipitation effects...

...J. Smith; Z. Qin; F. King; L. Werme; D.W. Shoesmith The mechanism and kinetics of Cu corrosion in anoxic aqueous chloride solutions containing sulfide (10⁻³ mol/L) have been investigated electrochemically and under natural corrosion conditions. Under these conditions Cu...

... hydrochloric acid inhibitors mechanism mild steel pickling sodium chloride sulfuric acid temperature The pickling of steels with hydrochloric acid (HCl) is always superior and more economical to pickling with sulfuric acid (H₂SO₄) because: ^1-5 — Ferrous...

... exposed to a concentrated NaOH environment was a result of the higher solubility of nickel phosphate (Ni₃[PO₄]₂) relative to nickel hydroxide (Ni[OH]₂) and nickel oxide (NiO). This mechanism predicted an inverse relationship between the thickness...

...R.L. Zeller, III Electroless nickel coatings are increasingly used in a variety of applications due to their advantageous chemical, mechanical, and physical properties. The purpose of this research is to investigate the mechanism of corrosion protection of high phosphorus (10 to 11 wt% P...

...J. Uruchurtu Chavarin The aim of this work was to study the activation mechanism of pure aluminum in the absence and presence of indium ions in a chloride-containing medium using the electrochemical noise technique. A correlation was obtained between the noise response and the type of corrosion...

... mechanism T-6Al-4V Stress corrosion cracking (SCC) of titanium alloys in acidic methanol has been studied for some time. ^1-8 The detailed mechanisms of crack initiation and propagation, however, are not yet fully understood. It has been suggested that SCC of titanium alloys in acidic...

... gives rise to some of the most worrisome problems concerning plant service life. Because of its importance in the nuclear field, IGSCC of nickel-based alloys in aqueous environments has been more particularly investigated. ^1-5 However, despite these extensive studies, the mechanisms involved...