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97162 HIGH TEMPERATURE MATERIAL CONSIDERATIONS IN CHEMICAL WASTE INCINERATORS

Picture for 97162 HIGH TEMPERATURE MATERIAL CONSIDERATIONS
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Product Number: 51300-97162-SG
ISBN: 97162 1997 CP
Author: George Lai, Hira Ahluwalia
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The complex and corrosive nature of the incineration environment coupled with high temperatures can lead to premature failure of various metallic components in an incinerator. Specifying materials solely for service in non-corrosive, high-temperature environments is somewhat straight forward and well understood. However, the effects of corrosion on the alloy’s properties and its subsequent life expectancy is not well known and difficult to predict. The importance of appropriate material selection, failure analysis, fabrication technique and process control are illustrated by discussion of a case history involving an incinerator chute. Keywords: High temperature, selection, thermal fatigue. incineration, sulfidation, alloy HR-160, chute, rotary kiln, material
The complex and corrosive nature of the incineration environment coupled with high temperatures can lead to premature failure of various metallic components in an incinerator. Specifying materials solely for service in non-corrosive, high-temperature environments is somewhat straight forward and well understood. However, the effects of corrosion on the alloy’s properties and its subsequent life expectancy is not well known and difficult to predict. The importance of appropriate material selection, failure analysis, fabrication technique and process control are illustrated by discussion of a case history involving an incinerator chute. Keywords: High temperature, selection, thermal fatigue. incineration, sulfidation, alloy HR-160, chute, rotary kiln, material
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Product Number: 51319-12862-SG
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Since geothermal wells are a feasible energy source to replace fossil fuel supply many technologies have been developed to take advantage of geothermal energy. Nevertheless service conditions in geothermal facilities are due to the chemical composition of hydrothermal fluids and temperatures in many cases extreme in terms of corrosion. Therefore materials selection based on preliminary material qualification is essential to guarantee a secure and reliable operation of the facilities. During operation of a geothermal research facility in Groß Schönebeck copper effects have been found downhole. Occurring mechanisms and measures to prevent copper precipitation or scaling needed to be investigated.This contribution deals with the evaluation of the corrosion behavior of different metals ranging from carbon steel via stainless and duplex steels to titanium in a copper containing artificial geothermal water simulating the conditions in the Northern German Basin.The behavior of carbon duplex stainless steels and titanium in this geothermal fluid obtained by electrochemical measurements and exposure tests will be presented. While carbon steel exhibits coppering and copper precipitation higher alloyed materials show different response to Cu-species in saline geothermal water.Basing on these results the suitability of the investigated materials for use in such conditions will be evaluated.
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