Search

Green innovation, which has spatial spillover effects, is a crucial way to accelerate the transformation and upgrading of urban economic structure, then to achieve sustainable development for the urban in China. Therefore, it is meaningful to study the effects of urban green innovation on economic development quality (EDQ). In this paper, using the panel data of 270 cities during 2005–2017 in China, we investigated spatial effect and effect decomposition result of green innovation on EDQ by applying Spatial Durbin Model (SDM). The results revealed that both green innovation and EDQ had demonstrated a trend of regional agglomeration and fluctuating development; the coefficient of direct effect and spatial spillover effect of green innovation on EDQ is significantly positive, green innovation is conducive to enhance EDQ in local city and adjacent cities. Therefore, it is necessary to put forward green innovation policy recommendations for around sustainable development.

The corrosion behaviour of 3Cr steel at CO2 partial pressures (pCO2) of 2.7/28.5 bar and 200 °C was investigated. The evolution of double-layered corrosion scales was analysed by surface analysis to identify physical and chemical nature and results are combined with an analysis of thermodynamic calculations. Both experimental and thermodynamic results show that the corrosion scales comprise a crystalline FeCO3 outer layer and an inner Fe3O4, FeCr2O4, and Cr(OH)3 at 2.7 bar pCO2. At 28.5 bar pCO2, the inner layer evolves to be a mixture of FeCr2O4 and Cr(OH)3 containing concentrated Cl− ions, and this induces an enhancement of localised corrosion.