Acrylic polyurethane paint on the surface of 2A12 Al alloy was cleaned utilizing an atmospheric pressure plasma jet in this work.The dynamic evolution of the paint removal process during plasma treatment with time was...Acrylic polyurethane paint on the surface of 2A12 Al alloy was cleaned utilizing an atmospheric pressure plasma jet in this work.The dynamic evolution of the paint removal process during plasma treatment with time was explored through analysis of morphology and chemical states.The results showed that although the thickness of paint could be reduced effectively with an increase in cleaning time,the removal rate of paint gradually decreased with time.During the initial cleaning process range,its original smooth morphology of paint turned rugged quickly and was almost unchanged with further plasma treatment.Element and chemical state analysis showed that the content of C in the paint layer decreased obviously after plasma treatment.In contrast,the O content increased remarkably.The cleaning mechanism could be mainly attributed to the reaction between active O-containing species in air plasma and organic components in the paint.After removal of superficial organic matter,residue inorganic metal oxide substances aggregated on the base.The exposed metal oxides on the one hand elevated the superficial O content,but on the other hand hindered further plasma penetration,resulting in a gradual decrease in cleaning rate with cleaning time.Therefore,physical wiping was proposed to be incorporated with the plasma method and effective removal of paint was realized.展开更多
国际海事组织(IMO)全球船用燃油含硫量限制规定,从2020年1月1日起船用燃油含硫量(质量分数,下同)不应超过0.5%(此前为3.5%),在排放控制区内含硫量不应超过0.1%~[1]。交通运输部海事局于2019年10月25日发布《2020年全球船用燃油限硫令实...国际海事组织(IMO)全球船用燃油含硫量限制规定,从2020年1月1日起船用燃油含硫量(质量分数,下同)不应超过0.5%(此前为3.5%),在排放控制区内含硫量不应超过0.1%~[1]。交通运输部海事局于2019年10月25日发布《2020年全球船用燃油限硫令实施方案》,以贯彻实施IMO全球船用燃油含硫量限制的规定。此前各航运公司均已充分评估形势,部分航运公司选择采用加装脱硫塔而继续采用高硫燃油,部分船舶所有人暂时还在观望,准备继续使用船用轻质柴油(Marine Gas Oil,MGO)进行过渡。展开更多
基金supported by National Natural Science Foundation of China(No.U21A20438)the Foundation of Key Laboratory of Radiation Physics and Technology of the Ministry of Education(No.2021SCURPT03)。
文摘Acrylic polyurethane paint on the surface of 2A12 Al alloy was cleaned utilizing an atmospheric pressure plasma jet in this work.The dynamic evolution of the paint removal process during plasma treatment with time was explored through analysis of morphology and chemical states.The results showed that although the thickness of paint could be reduced effectively with an increase in cleaning time,the removal rate of paint gradually decreased with time.During the initial cleaning process range,its original smooth morphology of paint turned rugged quickly and was almost unchanged with further plasma treatment.Element and chemical state analysis showed that the content of C in the paint layer decreased obviously after plasma treatment.In contrast,the O content increased remarkably.The cleaning mechanism could be mainly attributed to the reaction between active O-containing species in air plasma and organic components in the paint.After removal of superficial organic matter,residue inorganic metal oxide substances aggregated on the base.The exposed metal oxides on the one hand elevated the superficial O content,but on the other hand hindered further plasma penetration,resulting in a gradual decrease in cleaning rate with cleaning time.Therefore,physical wiping was proposed to be incorporated with the plasma method and effective removal of paint was realized.
文摘国际海事组织(IMO)全球船用燃油含硫量限制规定,从2020年1月1日起船用燃油含硫量(质量分数,下同)不应超过0.5%(此前为3.5%),在排放控制区内含硫量不应超过0.1%~[1]。交通运输部海事局于2019年10月25日发布《2020年全球船用燃油限硫令实施方案》,以贯彻实施IMO全球船用燃油含硫量限制的规定。此前各航运公司均已充分评估形势,部分航运公司选择采用加装脱硫塔而继续采用高硫燃油,部分船舶所有人暂时还在观望,准备继续使用船用轻质柴油(Marine Gas Oil,MGO)进行过渡。
