自動車排気ガス中におけるステンレス鋼の高温腐食挙動(<特集>ステンレス鋼)

概要

論文の詳細を見る
Recently, various emission control devices for automobile suh as thermal reactors and catalytic convertors have been designed and put in practical use for anti-pollution purposes. In this study, to offer the necessary data to decide the most suitable materials for these devices, oxidation tests for comparatively good oxidation-resistant stainless steels have been carried out in the atmospheres of exhaust gas from automobile engine at high temperatures, and the mechanism of high temperature corrosion occuring on the materials has been studied. In the exhaust gas, the oxidation of materials takes place in a more accelerated form than in air. By calculating the sulfer potential of the exhaust gas consisting of CO-CO_2-COS-SO_2-S_2-O_2 system, it is concluded that the oxidation of the materials by CO_2, H_2O, and O_2 in the exhaust gas at high temperatures is accelerated by sulfer, by the formation of sulfer compounds such as iron, chromium, or nickel sulfied between the oxide scale and the base metal.
社団法人日本鉄鋼協会の論文
1977-04-01