Erosion of elevated-temperature corrosion scales on metals

Abstract

Combined erosion-corrosion poses a considerable problem to the design of long lifetime metallic components in energy conversion systems.To gain some insight into this problem, scales were formed on stainless steel at elevated temperature and subsequently were eroded at room temperature to determine the nature of the erosion rates and the mechanism of scale removal. Thin corrosion scales were formed on 310 stainless steel and an experimental Fe-18Cr-5Al-1Hf alloy at high temperatures (9ooo and 980°C) in gas mixtures with various levels of oxygen and combined oxygen-sulfur. The corroded specimens were eroded at room temperature in an air-solid particle stream using 50~m SiC at 60 ms-1. The conditions of the corrosive exposures, the rates of erosion of these scales and the microscopic appearance of the eroded surface were correlated to determine the mechanism of thin scale erosion.

Erosion Behaviour of API X100 Pipeline Steel at Various Impact Angles and Particle Speeds

“…Unfortunately, there is no universal model that can effectively predict all erosion situations [8][9][10] and development of a reliable and effective model for solid erosion process still remains a challenge. Several attempts have been made to understand the effect of different parameters, such as; temperature, particles size, and microstructure of both the impinging and eroding surfaces on the solid particles erosion process [11][12][13][14][15][16][17]. However, each parameter behaves in a manner peculiar to each process and is often complex due to interrelated variables involved [18][19][20][21][22][23][24].…”

Characterization of a coating 316L applied by plasma transferred arc

“…Stepen oštećenja površine materijala, usled delovanja erozije, zavisi od vrste materijala (mete), vrste erodenta, ugla nastrujavanja, brzine čestica, vremena trajanja erozije, radne temperature, mikrostrukture materijala, itd. [2][3][4][5][6][7][8][9]. Od navedenih parametara koji utiču na stepen oštećenja, odnosno brzinu erozije materijala, posebno se izdvajaju ugao nastrujavanja i brzina čestica erodenta kao dominantni [10][11][12][13].…”