Corrosion Properties Of Alloys Research Articles

Long term high temperature corrosion studies of high temperature alloys in chlorine contaminated environments

High temperature chlorine contaminated environments may be encountered in a number of modern industrial and energy conversion systems. Such environments have been shown to be extremely severe from a corrosion control standpoint. Rather little information is available on the corrosion properties of alloys in these environments, and the bulk of this information has been obtained in shortterm tests (24 hours or less). This paper will report the results of a series of high temperature corrosion tests performed on superalloys for periods up to 400 hours in an oxidizing environment consisting of argon containing 20 pet oxygen and 0.25 pct chlorine at 900 ° C.

A High Purity Approach to High Chromium Ferritic Stainless Steels

Abstract This paper discusses merits of a high chromium ferritic stainless steel with extremely low levels of carbon and nitrogen. Data are shown on effects of carbon, nitrogen, and other impurity elements on alloy corrosion properties, mechanical properties, mill processing, and fabricability. Properties of Type XM-27, a 26Cr-1Mo high purity ferritic made by electron-beam refining, are discussed for various product forms. Weldability and fabrication characteristics are reviewed with emphasis on heat exchangers and pressure vessels. Use of Type XM-27 in chemical, petroleum, and fertilizer processing equipment is described. Service performance results, in some cases showing 24-month data, are presented.