Download or read book The effect of decontamination cycle on stress corrosion cracking of type 304 stainless steel in BWR simulated high temperature water written by and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Sulfuric Acid Oxygen and Hydrogen in High temperature Water on Stress Corrosion Cracking of Sensitized Type 304 Stainless Steel written by and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The influence of dissolved oxygen and hydrogen and dilute sulfuric acid in 289°C water on the stress-corrosion-cracking susceptibility of lightly and moderately sensitized Type 304 stainless steel was determined in constant-extension-rate tensile (CERT) tests. The CERT parameters and the fracture surface morphologies were correlated with the concentrations of dissolved oxygen and sulfate, and the electrochemical potentials of platinum and Type 304 stainless steel electrodes in simulated boiling-water reactor (BWR) environments. A particularly high susceptibility to intergranular cracking was found for the steel in the lightly sensitized condition at oxygen concentrations between approx. 0.05 and 0.2 ppM under slightly acidic conditions (pH approx. 6.0 at 25°C), which may, in part, account for the pervasive nature of intergranular cracking in BWR piping systems. Scanning-transmission electron microscopy analyses revealed significant differences between samples in the lightly and the moderately sensitized condition with respect to the width, but not the depth, of the chromium-depleted region at the grain boundaries. The addition of 0.5 ppM hydrogen to the water had only a small mitigating effect on intergranular cracking in water containing oxygen and sulfuric acid at low concentrations; however, oxygen suppression to less than or equal to 0.05 ppM in the reactor-coolant water, by means of hydrogen additions to the feedwater, would be quite beneficial provided impurities are also maintained at very low levels.
Download or read book The Effect of Aqueous Impurities on the Stress Corrosion Cracking of Austenitic Stainless Steel in High temperature Water written by R. B. Davis and published by . This book was released on 1983 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Corrosion Crack Growth Rates in Type 304 Stainless Steel in Simulated BWR Environments written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Stress corrosion cracking of Type 304 stainless steel has been studied with fracture-mechanics-type standard 25.4-mm-thick compact tension specimens in simulated boiling-water reactor environments at 289°C and 8.3 MPa. Tests were performed with either constant or cyclic loading. The latter tests used a positive sawtooth waveform with an unloading time of 1 or 5 s, a load ratio R (minimum load to maximum load) of 0.2 to 0.95, and a frequency f of 8 x 10−4 to 1 x 10−1 Hz. Crack lengths and crack growth rates were determined by the compliance method; crack mouth opening displacement was measured with in-situ clip gauges. Fractography was used to examine the mode of cracking and to confirm the compliance method for crack length determination. The test environments were high-purity deionized water with 0.2- to 8-ppM dissolved oxygen, and water with 0.2-ppM dissolved oxygen and 0.1-ppM sulfate (as H2SO4). Two heats with a carbon content of 0.06 wt % were investigated in solution-heat-treated and furnace-sensitized conditions. Degree of sensitization varied from approx. 0 to 20 C/cm2 as measured by the electrochemical potentiokinetic polarization method. 8 references, 7 figures, 5 tables.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1989 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Corrosion Cracking and Corrosion Fatigue of Sensitized Type 304 Stainless Steel in Simulated BWR Environments written by Ohio State University. Department of Metallurgical Engineering and published by . This book was released on 1985 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Corrosion of Type 304 Stainless Steel in Simulated Superheat Reactor Environments written by G. G. Gaul and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessment of Susceptibility of Type 304 Stainless Steel to Intergranular Stress Corrosion Cracking in Simulated Savannah River Reactor Environments written by and published by . This book was released on 1989 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Intergranular stress corrosion cracking (IGSCC) of Type 304 stainless steel rate tests (CERT) of specimens machined was evaluated by constant extension from Savannah River Plant (SRP) decontaminated process water piping. Results from 12 preliminary CERT tests verified that IGSCC occurred over a wide range of simulated SRP envirorments. 73 specimens were tested in two statistical experimental designs of the central composite class. In one design, testing was done in environments containing hydrogen peroxide; in the other design, hydrogen peroxide was omitted but oxygen was added to the environment. Prediction equations relating IGSCC to temperature and environmental variables were formulated. Temperature was the most important independent variable. IGSCC was severe at 100 to 120C and a threshold temperature between 40C and 55C was identified below which IGSCC did not occur. In environments containing hydrogen peroxide, as in SRP operation, a reduction in chloride concentration from 30 to 2 ppB also significantly reduced IGSCC. Reduction in sulfate concentration from 50 to 7 ppB was effective in reducing IGSCC provided the chloride concentration was 30 ppB or less and temperature was 95C or higher. Presence of hydrogen peroxide in the environment increased IGSCC except when chloride concentration was 11 ppB or less. Actual concentrations of hydrogen peroxide, oxygen and carbon dioxide did not affect IGSCC. Large positive ECP values (+450 to +750 mV Standard Hydrogen Electrode (SHE)) in simulated SRP environments containing hydrogen peroxide and were good agreement with ECP measurements made in SRP reactors, indicating that the simulated environments are representative of SRP reactor environments. Overall CERT results suggest that the most effective method to reduce IGSCC is to reduce chloride and sulfate concentrations.
Download or read book Analysis of the Effects of Corrosion Potential and Impurities on the Stress Corrosion Cracking of Type 304 Stainless Steel written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Intergranular stress corrosion cracking (IGSCC) of sensitized Type 304 stainless steel (SS) has been a recurrent problem in the high-temperature water environment of boiling-water-reactors (BWRs) over the past two decades. The synergistic effects of environmental and material variables on stress corrosion cracking (SCC) of Type 304 SS were investigated at 289°C by means of constant-extension-rate-tensile (CERT) tests at a strain rate of 1 x 10−6/s. Correlations among environmental variables (dissolved oxygen and impurity concentrations, viz., H2SO4, steady-state open-circuit electro-chemical potential) and the SCC susceptibility parameters have been determined. The extensive results over a wide range of open-circuit corrosion potential conditions were analyzed by a model which accounts for the effects of environmental variables, microstructure (e.g., degree of sensitization) and strain rate. The results are consistent with a slip-dissolution mechanism for SCC. Furthermore, representation of the dependence of corrosion potential and average crack growth rate on the dissolved oxygen concentration of the water by a simple mathematical function, in conjunction with the theoretical model, enables predictions of both strain rate and environmental effects on the SCC susceptibility of sensitized Type 304 SS. 12 refs., 7 figs.
Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Water Chemistry of Nuclear Reactor Systems written by and published by . This book was released on 1981 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Environmental Variables on the Stress Corrosion Cracking Behavior of Type 304 Stainless Steel in High Temperature Water Environments written by Peter L. Andresen and published by . This book was released on 1979* with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of Impurities on Stress Corrosion Cracking in Type 316NG Stainless Steel written by William Dale Miller and published by . This book was released on 1985 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Temperature and Dissolved Oxygen on the Stress Corrosion Cracking Susceptibility of Type 304 Stainless Steel in High Temperature High Purity Water written by Gary Arthur Welch and published by . This book was released on 1978 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Organic Acids on the Stress corrosion Cracking of Type 304 Stainless Steel in High Temperature Water written by Timothy Keane Christman and published by . This book was released on 1985 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STRESS CORROSION CRACKING AND CORROSION FATIGUE OF SENSITIZED TYPE 304 STAINLESS STEEL IN SIMULATED BWR ENVIRONMENTS written by D. D. Macdonald and published by . This book was released on 1985 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stress Corrosion Cracking the Slow Strain rate Technique written by G. M. Ugiansky and published by ASTM International. This book was released on 1979 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt:
