Energy Conversion Technology for Recycling Society with Minimized Impact on the Environment

Oshita, Takahiro; Naruse, Katsutoshi

doi:10.3323/jcorr1991.51.487

Cited by 1 publication

(2 citation statements)

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“…To achieve higher efficiency and render waste harmless, a variety of waste treatment systems have been proposed. Furthermore, the application of materials in various environments is being sought [1][2][3][4]. Therefore, the selection of materials with excellent environmental tolerance is an important and challenging consideration for practical application [5] and often determines whether system performance improves.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Alloying Elements on Corrosion Resistance of Ni-Base Cast Alloys in Waste Incineration Environments

Noguchi¹,

Matsuoka²,

Sakamoto³

et al. 2006

MSF

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After examining practical structural materials for use in the high-temperature environments of waste incinerators, it was found that a Ni-Cr-W casting alloy is promising. However, the corrosion reaches its peak in the vicinity of 900°C. This peak is related to the behavior of chlorides that form in the interior of the alloy. As the chlorides continuously generate and decompose, the Cl recycles, accelerating corrosion. It is thought that when the temperature rises, the chlorides vaporize outside the alloy, suppressing Cl recycling and thus reducing the amount of corrosion. Adding Al to the alloy generates highly volatile AlCl3, making it possible to prevent the accumulation of chlorides in the vicinity of 900°C and lower the corrosion peak. As a result of conducting exposure testing for a year at an actual incinerator, it was demonstrated that adding Al is an effective way to improve corrosion resistance.

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Section: Introductionmentioning

confidence: 99%

“…A schematic diagram of the system is shown in Fig. 1 [3]. Since the heat exchanger tubes are exposed to a high-temperature corrosive gas environment, it is necessary to select structural materials that combine both high-temperature strength and corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%