Ke ZHANG
,
Yan NIU
,
Chaoliu ZENG
材料科学技术（英文）
The corrosion behaviors of Fe and four commercial steels with different Cr contents were investigated in an oxidizing atmosphere containing HCl at 500~600℃, which simulated the environment to which materials are usually exposed in waste incineration. All the test materials underwent an accelerated corrosion in this atmosphere and small amounts of chlorine could be detected a t the metal/scale interface. The corrosion mechanism is discussed on the basis of thermodynamic considerations for the reactions between metals and mixed O-Cl gases.
关键词:
Commercial steels
,
null
,
null
,
null
成果
,
龙东辉
,
刘小军
,
凌立成
新型炭材料
doi:10.1016/S1872-5805(08)60050-5
以钛酸正丁酯为钛源、蔗糖为炭源,采用溶胶-凝胶法制得有机-无机复合干凝胶,后经高温炭热反应、氯气化学刻蚀分别得到中孔碳化钛及碳化物基炭材料(CDCS).通过XRD、Raman、SEM、TEM和氮气吸附等表征,考察了钛酸正丁酯/蔗糖摩尔比例(R)对所制碳化钛和CDCS的孔结构和物理特性的影响.结果表明:在碳热过程所形成的中孔和大孔孔隙能够在氯气刻蚀过程中保持并传递给最终的炭材料.所制CDCS具有三种不同层次的孔隙结构,分别为氯气刻蚀碳化钛品体所产生的微孔、源自蔗糖残留炭中所含的3nm～4nm中孔以及炭颗粒间相互叠加和连接所形成的大孔.通过改变R比值,所制CDCS的BET比表面积和孔容分别在1479m2/g～1640m2/g和1.06cm3/g～2.03cm3/g之间可调.
关键词:
分等级孔结构
,
中孔碳化钛
,
氯气刻蚀
,
孔隙结构
