STUDY OF STEEL TESTS OF STATIC CORROSION EXPERIMENTS IN LIQUID METAL PB-BI
We try to evaluate the possibility of maintaining the corrosion-resistance of a structural material under the operational temperature and flow velocity of the optimized HYPER (HYbrid Power Extraction Reactor)[1] cooling system. It was attempted to consider the control of the oxygen concentration in the range of 350~650°C. Currently, we are performing static corrosion tests with the oxygen contents of a reduced and 10~ 10 wt% atmospheres at the temperature of 600°C. The concentration was controlled by adjusting the H2 and H2O vapor ratio. In this paper, we will show the result of the experiment performed under the reduced atmosphere with an exposure time up to 1500 hours. The corrosion of 316L is irregularly severe under the reduced atmosphere due to the solubility of the nickel at Pb and Pb-Bi. Also small amount of iron and chromium was dissolved near the surface. On the other hand, the T91 and HT9 maintained the corrosion-resistance under the same condition.
High Temperature Corrosion of Engineering Alloys
This extensive materials selection and application book is the first of its kind. It describes a comprehensive treatment of all forms of high temperature corrosion problems encountered in industry, especially gas turbine and aerospace, heat treating, mineral and metallurgical processing, ceramic, electronic and glass manufacturing, automotive pulp and paper waste incineration fossil fuel power generation coal gasification nuclear. Materials problems discussed include those due to oxidation, carburization and metal dusting nitridation, halogen corrosion, sulfidation, ash/salt deposit corrosion (e.g. hot corrosion, fuel ash corrosion, etc.), molten salt corrosion and molten metal corrosion. This single source contains an exhaustive corrosion database with a total of 101 tables and 169 figures, eliminating the need for conducting a time-consuming literature search. This book is a must for solving high temperature corrosion problems and learning about corrosion reactions of various high temperature corrosion modes. Contents: Methods of Testing and Evaluation Oxidation Carburization and Metal Dusting Nitridation Corrosion by Halogen Sulfidation Ash/Salt Deposit Corrosion - Molten Salt Corrosion Molten Metal Corrosion.
Selective etching of InP in NaF solution
Abstract The crossing porous structure of InP has been obtained by electrochemical etching in NaF solutions. The behavior of the periodic oscillation occurs at different potential ranges for the different concentrations of solutions, and it will disappear with the concentration of the solution decreased. The scanning electron microscope (SEM) image shows that the pores have two directions on the surface and are perpendicular to each other. The two directions are assigned to [0 1 1] and [ 0 1 ¯ 1 ], respectively. The SEM image of the cross-section also shows that the two directions are assigned to [1 1 1]B and [ 1 1 ¯ 1 ¯ ]B. Both are due to the selective etching of F− ions. The crossing porous structure of InP is a very promising feature for the three-dimensional structure of III–V compound semiconductors for photonic band gap materials.