Q235carbon steel and Q450 weathering steel were exposed to the hot and dry environment of Turpan,China for three years.The corrosion rates of both steels were calculated and compared.The morphologies of the rust layer...Q235carbon steel and Q450 weathering steel were exposed to the hot and dry environment of Turpan,China for three years.The corrosion rates of both steels were calculated and compared.The morphologies of the rust layer products were observed by optical microscopy and scanning electron microscopy.Analyses of the rust layers were performed by X-ray photoelectron spectroscopy,X-ray powder diffraction,and Raman spectroscopy,and analysis results indicate that the compositions of rust are main iron rich oxide such as FeOOH,Fe_3O_4,and Fe_2O_3.The iron oxide layer content proportion was calculated through a semi-quantitative algorithm.The resistance elements（Cr,Ni,and Cu）enhanced the resistance properties of the Q450 weathering steel matrix.Moreover,the resistance elements increased the proportion of goethite crystals in the corroded rust layer.展开更多
Heart failure(HF)is a worldwide problem due to the substantial morbidity and mortality of patients with cardiovascular diseases.Recently,the PARADIGM-HF trial(the Prospective comparison of angiotensin receptor-neprily...Heart failure(HF)is a worldwide problem due to the substantial morbidity and mortality of patients with cardiovascular diseases.Recently,the PARADIGM-HF trial(the Prospective comparison of angiotensin receptor-neprilysin inhibitor[ARNI]with angiotensin-converting enzyme inhibitor[ACEI]to Determine Impact on Global Mortality and morbidity in Heart Failure trial)showed that ischemic heart disease is the most common etiology of HF,which accounts for 60%of HF with reduced ejection fraction(HFrEF).展开更多
基金Item Sponsored by National Natural Science Foundation of China(51222106)Fundamental Research Funds for Central Universities of China(230201306500002)National Basic Research Program of China(2014CB643300)
文摘Q235carbon steel and Q450 weathering steel were exposed to the hot and dry environment of Turpan,China for three years.The corrosion rates of both steels were calculated and compared.The morphologies of the rust layer products were observed by optical microscopy and scanning electron microscopy.Analyses of the rust layers were performed by X-ray photoelectron spectroscopy,X-ray powder diffraction,and Raman spectroscopy,and analysis results indicate that the compositions of rust are main iron rich oxide such as FeOOH,Fe_3O_4,and Fe_2O_3.The iron oxide layer content proportion was calculated through a semi-quantitative algorithm.The resistance elements（Cr,Ni,and Cu）enhanced the resistance properties of the Q450 weathering steel matrix.Moreover,the resistance elements increased the proportion of goethite crystals in the corroded rust layer.
基金This study was supported by grants from the Shanghai Municipal Education Commission-Gaofeng Clinical Medicine Grant Support(No.20161402)the Science and Technology Commission of Shanghai Municipality(No.15DZ1942003)。
文摘Heart failure(HF)is a worldwide problem due to the substantial morbidity and mortality of patients with cardiovascular diseases.Recently,the PARADIGM-HF trial(the Prospective comparison of angiotensin receptor-neprilysin inhibitor[ARNI]with angiotensin-converting enzyme inhibitor[ACEI]to Determine Impact on Global Mortality and morbidity in Heart Failure trial)showed that ischemic heart disease is the most common etiology of HF,which accounts for 60%of HF with reduced ejection fraction(HFrEF).
