Effect of Shot Blasting on Oxidation of TP304 Austenitic Stainless Steel in Steam

2011 ◽  
Vol 317-319 ◽  
pp. 179-184
Author(s):  
Zhi Wu Wang ◽  
Yan Lei ◽  
Wei Wang ◽  
Yi Wei Wu ◽  
Jie Wang
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Oxide Film ◽  
Oxidation Resistance ◽  
Oxidation Kinetics ◽  
Steam Oxidation ◽  
Shot Blasting ◽  
X Ray ◽  
High Temperature And Pressure ◽  
Temperature And Pressure

In this research, TP304 was treated by shot blasting under the pressure of 0.65MPa. The stainless steel shots used in the shot blasting experiment were in different sizes, separately with diameter 0.6mm and 1.2mm. To investigate the effect of shot blasting on the oxidation resistance behavior, steam oxidation experiments have been conducted to both original and shot blasting treating TP304s in 650°C and 25MPa. Then oxidation kinetics curve of each sample was measured by discontinuous weight method, morphology of oxide film was observed through SEM(scanning electron microscope), the component of the oxidation was measured by XRD(X-ray Diffraction), and the variation of Cr content in the oxide film was analyzed by EDS(energy-dispersive X-ray spectroscopy). According to the results, Oxidation kinetics curve in high temperature and pressure, expressed in original and shot blasting treating TP304s, both follow the principle of quasi-parabola and shot blasting can largely enhance TP304’s steam oxidation resistance in high temperature and pressure.

Collimator for inelastic x-ray scattering experiments at high temperature and pressure conditions

2004 ◽  
Vol 24 (4) ◽  
pp. 463-469 ◽  
Author(s):  
S. Falconi ◽  
G. Monaco ◽  
W. A. Crichton ◽  
M. Mezouar ◽  
R. Verbeni
Keyword(s):  
High Temperature ◽  
X Ray ◽  
X Ray Scattering ◽  
High Temperature And Pressure ◽  
Temperature And Pressure ◽  
Ray Scattering

A Passive Film Formed on Alloy 600 in High Temperature Aqueous Solution

2008 ◽  
Vol 135 ◽  
pp. 103-106
Author(s):  
Dong Jin Kim ◽  
Hyuk Chul Kwon ◽  
Seong Sik Hwang ◽  
Hong Pyo Kim
Keyword(s):  
Corrosion Resistance ◽  
High Temperature ◽  
Oxide Film ◽  
Dissolved Oxygen ◽  
Passive Film ◽  
Alloy 600 ◽  
Pressure Condition ◽  
High Temperature And Pressure ◽  
Deaerated Solution ◽  
Temperature And Pressure

Alloy 600(74wt% Ni, 15wt% Cr, 9wt% Fe) is used as a material for steam generator tubing in pressurized water reactors(PWR) due to its high corrosion resistance under a PWR environment whose primary side and secondary side are operated under 340oC, 150bar and 290oC, 50bar, respectively. However, in spite of its outstanding corrosion resistance, a stress corrosion cracking(SCC) which has been one of the most important degradation issues, has occurred occasionally owing to the severe high temperature and pressure condition of a PWR. It is expected that a SCC is deeply related to an electrochemical property of a passive film formed under a high temperature and pressure condition. Therefore an understanding of the basic electrochemical behaviors regarding an anodic dissolution and a passivation of the bare surface of metals and alloys provides important information about a SCC mechanism and control. In the present work, the passive oxide films on Alloy 600 were investigated as a function of the dissolved oxygen content and the pH by using a potentiodynamic polarization, electrochemical impedance spectroscopy(EIS) and a depth profiling by Auger electron spectroscopy(AES). For this purpose, 0.5M H3BO3, 0.5M Na2SO4 and 0.1M NaOH aqueous solutions with/without dissolved oxygen at 300oC were used as the test solutions. The resistance of an oxide formed in an aerated solution was smaller than that in a deaerated solution while the oxide film in the aerated solution was thicker than the oxide film in the deaerated solution.

Effects of Oxygen on Cutting Process in Machining Ti6Al4V

2014 ◽  
Vol 1049-1050 ◽  
pp. 69-72
Author(s):  
Hui Wang ◽  
Fu Sheng Ni ◽  
Lei Gu
Keyword(s):  
High Temperature ◽  
Chemical Composition ◽  
Oxide Film ◽  
Contact Surface ◽  
Cutting Process ◽  
Rake Face ◽  
High Temperature And Pressure ◽  
Alloy Tool ◽  
Cutting Zone ◽  
Temperature And Pressure

During the Ti6Al4V machining, the oxygen reaction will happened to form oxide film in the cutting zone under high temperature and pressure, which effect the cutting process. In this paper,the effects of oxygen on cutting process in machining Ti6Al4V with carbide alloy tool YG8 was investigated. The oxygen element generation, the chemical composition of the oxide and the oxide film generation in cutting process was studied. The research results show that variety of oxides generated in rake face and oxide film formed in the tool-chip contact surface, which effect the cutting process and tool life.

Synthesis of Ba(MgxNb1-x)O3 Nanoparticles by a Glycothermal Process

2006 ◽  
Vol 324-325 ◽  
pp. 1285-1288
Author(s):  
Rak Hee Kim ◽  
Jung Hoon Son ◽  
Dong Sik Bae
Keyword(s):  
High Temperature ◽  
Potassium Hydroxide ◽  
X Ray Diffraction ◽  
X Ray ◽  
High Temperature And Pressure ◽  
Metal Nitrates ◽  
Aqueous Potassium Hydroxide ◽  
Temperature And Pressure ◽  
Diffraction Patterns ◽  
Average Size

Ba(MgxNb1-x)O3 nanoparticles were prepared under high temperature and pressure conditions by precipitation from metal nitrates with aqueous potassium hydroxide. Ba(MgxNb1-x)O3 nanoparticles were obtained in the temperature range of 170185 for 4 h. TEM and X-ray diffraction patterns showed that the synthesized particles were crystalline. The average size and size distribution of the synthesized particles were around 100 nm and broad, respectively.

Sign in / Sign up

Export Citation Format

Share Document