The initiation of pitting corrosion at MnS inclusions

Baker, Mark; Castle, J. E.

doi:10.1016/0010-938x(93)90279-p

Cited by 192 publications

(102 citation statements)

References 21 publications

Supporting

Mentioning

100

Contrasting

Unclassified

Order By: Relevance

“…The behaviour of the 2219 aluminium alloy surface after progressive exposure to a 3.5% NaCl solution has been studied. Since the main form of corrosion for aluminium alloys is localized corrosion, the combination of high spatial resolution techniques, SEM, Auger, SAM and EDX, has proven to be ideal to investigate the dissolution of inclusions [9,10]. The alloy was immersed in the NaCl solution for different time intervals and the same intermetallics were located and analysis repeated after each exposure.…”

Section: Introductionmentioning

confidence: 99%

Localized corrosion of a 2219 aluminium alloy exposed to a 3.5% NaCl solution

Grilli¹,

Baker²,

Castle³

et al. 2010

Corrosion Science

130

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Localized corrosion of a 2219 aluminium alloy exposed to a 3.5% NaCl solution

Grilli¹,

Baker²,

Castle³

et al. 2010

Corrosion Science

130

View full text Add to dashboard Cite

“…The non-metallic inclusions are known to be preferred sites for the nucleation of pits on steels [11][12][13]. Steel corrosion studies have been conducted using aggressive media, such as NaCl, HCl and H2SO4 at relatively high concentration.…”

Section: Introductionmentioning

confidence: 99%

Corrosiveness of Brazilian Candiota Coal

2015

View full text Add to dashboard Cite

Candiota city, in the south of Brazil, is located near the largest reserves of mineral coal of the country. This coal is used for thermoelectric power generation. The extraction of coal from open-cut mines involves operations may generate at least some particulate matter into the atmosphere. These particles retained on the surface of metallic structures exposed to the atmosphere, may adsorb gases such as CO, CO2, SO2 and NO, which, in combination with humid air form corrosive substances, such as HNO3 and H2SO4. This paper aims to evaluate the influence of Candiota coal on the corrosion of buried steel structures and exposed to atmosphere containing particulate matter from coal combustion. The coal sample was characterized by SEM (scanning electron microscopy), thermogravimetric analysis (TGA), surface area analysis (BET method), electrical conductivity (EC) analysis, FTIR and Raman spectroscopy. Corrosion was simulated by exposure of steel samples to coal particles and thermoelectric industrial atmosphere. Electrochemical tests of solutions leached from the coal were conducted by voltammetry to evaluate the soluble compounds corrosiveness. The corrosion rate was determining following the technical standard ASTM G1-90. Localized attacks and corrosion products formations were detected in API 5L Grade B steel exposure to coal. The average corrosion rate for the samples in direct contact to the pulverized coal was 0.15 mm/year, while in samples exposed to the atmosphere from industrial power plant was 0.30 mm/year. It is concluded that API 5L Grade B steel metal structures, exposed to atmospheres rich in Candiota coal and its derivatives, must be properly protected and monitored to avoid future damage caused by corrosion.

show abstract

“…Since the main form of corrosion for aluminium alloys is localized corrosion, the combination of high spatial resolution techniques, scanning electron microscopy (SEM), Auger electron spectroscopy (AES), scanning Auger microscopy (SAM) and energy dispersive x-ray spectroscopy (EDX), has proven to be ideal to investigate the dissolution of inclusions [24,25]. In this study, these techniques are employed to examine formation of an Alodine 1200S coating on Al2219 at intermetallic sites and on the general matrix.…”

Section: Introductionmentioning

confidence: 99%