Laboratory Studies of Potassium-Halide-Induced High-Temperature Corrosion of Superheater Steels. Part 1: Exposures in Dry Air

Autor:	Dorota Bankiewicz, Hao Wu, Mikko Hupa, Patrik Yrjas
Rok vydání:	2015
Předmět:	Austenite Materials science General Chemical Engineering Potassium High-temperature corrosion Metallurgy Oxide Energy Engineering and Power Technology Halide chemistry.chemical_element Sanicro 28 Corrosion chemistry.chemical_compound Fuel Technology chemistry Superheater
Zdroj:	Energy & Fuels. 29:1186-1195
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef502245f
Popis:	In recent years, some concerns about halogen (Cl, Br, and F)-related high-temperature corrosion in biomass- or waste-fired boilers have been raised. The presence of alkali chlorides in the deposits is believed to play a major role in high-temperature corrosion of the superheater steel materials in biomass- or waste-fired boilers. Available data are very scarce regarding alkali-bromide- or -fluoride-induced corrosion. This work has carried out using lab-scale high-temperature corrosion tests with three different superheater tube materials (10CrMo9-10, AISI 347, and Sanicro 28) exposed to KBr or KF at different temperatures (400–600 °C). At relatively low temperatures (≤550 °C), KBr and KF showed corrosivity similar to that of KCl. At 600 °C, KF showed much stronger corrosivity than either KBr or KCl, especially in the cases with the low-alloy steel 10CrMo9-10 and the austenitic steel AISI 347. At 550 °C and above, the oxide layers formed on the three steels were generally thicker and more uneven when expos...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::de92737250fdde24d5d77528f22b41b7 https://doi.org/10.1021/ef502245f Zobrazit plný text záznamu