AN IN-SITU RAMAN STUDY ON THE OXIDATION OF MACKINAWITE AS A CORROSION PRODUCT LAYER FORMED ON MILD STEEL IN MARGINALLY SOUR ENVIRONMENTS

2021 ◽  
pp. 109516
Author(s):  
Wei Zhang ◽  
David Young ◽  
Bruce Brown ◽  
Cody Shafer ◽  
Fei Lu ◽  
...  
Keyword(s):  
Mild Steel ◽  
Corrosion Product ◽  
Product Layer ◽  
In Situ Raman ◽  
Corrosion Product Layer ◽  
Raman Study

In-situ Raman study on kinetics behaviors of hydrated bubble in thickening

2021 ◽  
pp. 152476
Author(s):  
Xin-Yang Zeng ◽  
Guozhong Wu ◽  
Si Zhang ◽  
Liwei Sun ◽  
Changyu Sun ◽  
...  
Keyword(s):  
In Situ Raman ◽  
Raman Study

In situ Raman study of sulfonate-doped polyaniline

1999 ◽  
Vol 44 (12) ◽  
pp. 1989-1997 ◽  
Author(s):  
Marie-Claude Bernard ◽  
Susana Cordoba de Torresi ◽  
Anne Hugot-Le Goff
Keyword(s):  
In Situ Raman ◽  
Raman Study ◽  
Doped Polyaniline

In Situ Raman Study on Electrochemical Li Intercalation into Graphite

1995 ◽  
Vol 142 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Minoru Inaba ◽  
Hiroyuki Yoshida ◽  
Zempachi Ogumi ◽  
Takeshi Abe ◽  
Yasuo Mizutani ◽  
...  
Keyword(s):  
In Situ Raman ◽  
Raman Study

Practical Experiences with Linear Polarization Measurements

CORROSION ◽  
1977 ◽  
Vol 33 (4) ◽  
pp. 117-128 ◽  
Author(s):  
R. H. HAUSLER
Keyword(s):  
Corrosion Product ◽  
Linear Polarization ◽  
Tap Water ◽  
Product Layer ◽  
Phase System ◽  
Two Phase ◽  
Ohmic Resistance ◽  
Corrosion Product Layer ◽  
Practical Experiences ◽  
Water Saturated

Abstract The linear polarization technique in principle is a convenient and rapid way for determining corrosion rates. In practice, one finds that it is often applied under conditions alien to the assumptions on the basis of which it was derived. This paper will present a series of comparative observations between linear polarization, resistance probe, and weight loss measurements in different systems. The systems studied were: (1) Hydrochloric acid containing acetylenic inhibitors, (2) a two phase system containing hydrocarbon and water saturated with H2S, and (3) tap water containing various inhibitors. An equation will be derived showing the effect of ohmic resistance due to corrosion product buildup. The effect of polarization on the properties of a corrosion product layer will be discussed qualitatively.

21. Influence of hydrazine and higher pH on the corrosion product layer of austenitic steel

1989 ◽  
pp. 1: 99-104
Author(s):  
J. Kysela ◽  
K. Jindrich ◽  
G. George ◽  
H. Kelm ◽  
D. Nebel ◽  
...  
Keyword(s):  
Austenitic Steel ◽  
Corrosion Product ◽  
Product Layer ◽  
Corrosion Product Layer

In Situ Raman Study of CO Electrooxidation on Pt( hkl ) Single‐Crystal Surfaces in Acidic Solution

2020 ◽  
Vol 59 (52) ◽  
pp. 23554-23558
Author(s):  
Min Su ◽  
Jin‐Chao Dong ◽  
Jia‐Bo Le ◽  
Yu Zhao ◽  
Wei‐Min Yang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Acidic Solution ◽  
Crystal Surfaces ◽  
Single Crystal Surfaces ◽  
Co Electrooxidation ◽  
In Situ Raman ◽  
Raman Study

Influence of Pyrrhotite on the Corrosion of Mild Steel

CORROSION ◽  
10.5006/2505 ◽  
2017 ◽  
Vol 74 (1) ◽  
pp. 37-49 ◽  
Author(s):  
Saba Navabzadeh Esmaeely ◽  
Gheorghe Bota ◽  
Bruce Brown ◽  
Srdjan Nešić
Keyword(s):  
Mild Steel ◽  
Steel Surface ◽  
Product Layer ◽  
Localized Corrosion ◽  
X Ray Diffraction ◽  
Galvanic Coupling ◽  
X Ray ◽  
H2s Corrosion ◽  
Corrosion Product Layer ◽  
Nacl Concentration

As a result of the electrical conductivity of pyrrhotite, it was hypothesized that its presence in the corrosion product layer on a steel surface could lead to localized corrosion. Mild steel specimens (API 5L X65) were pretreated to form a pyrrhotite layer on the surface using high-temperature sulfidation in oil. The pretreated specimens were then exposed to a range of aqueous CO2 and H2S corrosion environments at 30°C and 60°C. X-ray diffraction data showed that the pyrrhotite layer changed during exposure; in an aqueous CO2 solution it underwent dissolution, while in a mixed CO2/H2S solution it partially transformed to troilite, with some mackinawite formation. Initiation of localized corrosion was observed in both cases. It was concluded that this was the result of a galvanic coupling between the pyrrhotite layer and the steel surface. The intensity of the observed localized corrosion varied with solution conductivity (NaCl concentration); a more conductive solution resulted in higher localized corrosion rates, consistent with the galvanic nature of the attack.

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