Optical microscope(OM),scanning electron microscope(SEM),energy dispersive spectrometer (EDS) and X-ray Diffraction(XRD) were used to study the effects of rare earth on the microstructural characteristics of 55%Al-Zn-...Optical microscope(OM),scanning electron microscope(SEM),energy dispersive spectrometer (EDS) and X-ray Diffraction(XRD) were used to study the effects of rare earth on the microstructural characteristics of 55%Al-Zn-1.6%Si hot -dip coatings on steel.The results of OM,SEM and EDS showed that by adding RE into the 55%Al-Zn-1.6%Si bath,the saw-toothed shape of intermetallic reaction layer of coating became smooth,and the thickness of the overlay and intermetallic reaction layer decreased.The XRD results revealed that the intermetallic reaction layer was comprised of two different regions,a bright phase closest to the steel substrate with phases of Fe_2Al_3 and a dark phase closest to the metallic coating with phases of FeAl_3/α-Fe-Al-Si.展开更多
通过田间小区试验,测定了55%苯·唑·二甲钠WP的除草效果、对小麦及后茬作物的安全性。结果表明,55%苯.唑.二甲钠WP在施用剂量为330.0、412.5、495.0、825.0 g a.i./hm2时,对猪殃殃、播娘蒿、荠菜等小麦田阔叶杂草均有很好的防...通过田间小区试验,测定了55%苯·唑·二甲钠WP的除草效果、对小麦及后茬作物的安全性。结果表明,55%苯.唑.二甲钠WP在施用剂量为330.0、412.5、495.0、825.0 g a.i./hm2时,对猪殃殃、播娘蒿、荠菜等小麦田阔叶杂草均有很好的防除效果,药后30 d总杂草鲜重防效为95.4%~99.0%,对小麦的安全性较好,小麦增产12.2%~14.5%,对后茬作物大豆、花生、玉米安全性很好,无残留药害。展开更多
The spangle size of the 55% Al-Zn-Si steel is affected by the composition of the zinc pot, the cooling capacity after plating, and the substrate. According to previous studies, the size of spangles can be reduced by i...The spangle size of the 55% Al-Zn-Si steel is affected by the composition of the zinc pot, the cooling capacity after plating, and the substrate. According to previous studies, the size of spangles can be reduced by increasing the cooling ability after plating, and by adding Ti in the zinc pot. However, these two methods cannot reduce the spangle size smaller than 1. 5 mm. Therefore, in this study, we have focused on the influence of substrates on the formation of spangles of 55% Al-Zn-Si steel by comparing and analyzing substrates with different surface roughness, composition, morphology, crystal orientation, and alloy layers.展开更多
The digestion regularity of MCPA, ametryn and dim＇on which were the active ingredients of 55% MCPA · ametryn · diuron WP in sugarcane leaves and soil of sugarcane plantation collected from Changsha of Hunan...The digestion regularity of MCPA, ametryn and dim＇on which were the active ingredients of 55% MCPA · ametryn · diuron WP in sugarcane leaves and soil of sugarcane plantation collected from Changsha of Hunan Province and Haikou of Hainan Province in 2009 and 2010were studied in the paper, and the results showed that these three agents had rapid digestion. The final residue test showed that beth MCPA and ametryn had not been detected in the study; the average resi- dues of diuron in the soil collected from Hunan Province in 2009 and 2010 were 0.018 and 0.015 mg/kg, respectively which were slightly larger than the critical value of 0. 013mg,/kg; diuron had no been detected in other treatments.展开更多
Post-treated 55% Al-Zn steel plates, which have adequate mechanical properties and corrosion resistance ,are widely used for automobiles, household appliances, and other products. The heat resistance of 55% Al-Zn stee...Post-treated 55% Al-Zn steel plates, which have adequate mechanical properties and corrosion resistance ,are widely used for automobiles, household appliances, and other products. The heat resistance of 55% Al-Zn steel plates is slightly lower than that of aluminum plates or hot-dip aluminized steel plates, but their corrosion resistance is better. Herein,by testing at different baking temperatures and for different periods,the trends of color,gloss,and loss weight have been analyzed. The heat-resistant properties of differently post-treated 55% Al- Zn steel plates,aluminum plates,and hot-dip aluminized steel plates have been studied.展开更多
文摘Optical microscope(OM),scanning electron microscope(SEM),energy dispersive spectrometer (EDS) and X-ray Diffraction(XRD) were used to study the effects of rare earth on the microstructural characteristics of 55%Al-Zn-1.6%Si hot -dip coatings on steel.The results of OM,SEM and EDS showed that by adding RE into the 55%Al-Zn-1.6%Si bath,the saw-toothed shape of intermetallic reaction layer of coating became smooth,and the thickness of the overlay and intermetallic reaction layer decreased.The XRD results revealed that the intermetallic reaction layer was comprised of two different regions,a bright phase closest to the steel substrate with phases of Fe_2Al_3 and a dark phase closest to the metallic coating with phases of FeAl_3/α-Fe-Al-Si.
文摘通过田间小区试验,测定了55%苯·唑·二甲钠WP的除草效果、对小麦及后茬作物的安全性。结果表明,55%苯.唑.二甲钠WP在施用剂量为330.0、412.5、495.0、825.0 g a.i./hm2时,对猪殃殃、播娘蒿、荠菜等小麦田阔叶杂草均有很好的防除效果,药后30 d总杂草鲜重防效为95.4%~99.0%,对小麦的安全性较好,小麦增产12.2%~14.5%,对后茬作物大豆、花生、玉米安全性很好,无残留药害。
基金supported by the Research Institute,Testing Center,Cold Rolling Mill and Manufacturing Department of Baosteel
文摘The spangle size of the 55% Al-Zn-Si steel is affected by the composition of the zinc pot, the cooling capacity after plating, and the substrate. According to previous studies, the size of spangles can be reduced by increasing the cooling ability after plating, and by adding Ti in the zinc pot. However, these two methods cannot reduce the spangle size smaller than 1. 5 mm. Therefore, in this study, we have focused on the influence of substrates on the formation of spangles of 55% Al-Zn-Si steel by comparing and analyzing substrates with different surface roughness, composition, morphology, crystal orientation, and alloy layers.
基金Supported by Scientific and Technological Projects of Nanning Municipal Science and Technology Bureau(20132308)
文摘The digestion regularity of MCPA, ametryn and dim＇on which were the active ingredients of 55% MCPA · ametryn · diuron WP in sugarcane leaves and soil of sugarcane plantation collected from Changsha of Hunan Province and Haikou of Hainan Province in 2009 and 2010were studied in the paper, and the results showed that these three agents had rapid digestion. The final residue test showed that beth MCPA and ametryn had not been detected in the study; the average resi- dues of diuron in the soil collected from Hunan Province in 2009 and 2010 were 0.018 and 0.015 mg/kg, respectively which were slightly larger than the critical value of 0. 013mg,/kg; diuron had no been detected in other treatments.
文摘Post-treated 55% Al-Zn steel plates, which have adequate mechanical properties and corrosion resistance ,are widely used for automobiles, household appliances, and other products. The heat resistance of 55% Al-Zn steel plates is slightly lower than that of aluminum plates or hot-dip aluminized steel plates, but their corrosion resistance is better. Herein,by testing at different baking temperatures and for different periods,the trends of color,gloss,and loss weight have been analyzed. The heat-resistant properties of differently post-treated 55% Al- Zn steel plates,aluminum plates,and hot-dip aluminized steel plates have been studied.
