材料期刊网

ENHANCED PASSIVITY OF GUILLOTINED ALUMINIUM IN Na_2SiO_3 SOLUTION BY GEL FORMATION

C. Liu and G.T. Burstein (Department of MateriaIs Science and Metallurgy , University of Cambridge , Pembroke Street , Cambridge CB2 3QZ , United Kingdom)

金属学报(英文版)

The passivity of guillotined aluminium electrode is enhanced in alkaline electrolytes by SiO32-. It is proposed that the formation of a complete aluminosilicate gel is responsible for this phenomenon. Dissolution of the metal proceeds via the existing film and the dissolution product reacts with SiO_3~2- ions to form the gel. Under galvanostatic polarisation, significant amount of the gel is formed when the applied anodic i > 10mA cm-2. This gel layer can then be transformed into barrier-type of oxide film, thus contributing to the initial stage of the high voltage anodisation.

关键词: passivity , null , null , null , null

THE STEEL INDUSTRY IN ARAB COUNTRIES

S.A. Al-Aghbari and Z. W. Lu Ministry of Oil & Mineral Resources , Republic of Yemen Thermal-Engineering Department , Northeastern University , Shenyang 110006 , China

金属学报(英文版)

A brief introduction to Arab countries, in respect of their locations, populations, areas and mineral resources, was given. The development of steel industry in Am6 countries in last two decades was staled as a whole. And the steel industries in Egypt, Qatar, Saudi Arabia, United Arch Emirates (UAE), Morocco, Libya, Joanal, Tunisia, Syria, Iraq, Algeria and Bahrain were analyzed separately. Some development problems faced by Arab steel industry, such as steel market, natural resources, manpower and finance, were pointed out.

关键词: steel industry , null , null

优质超薄产品用的fTSR技术发展

钢铁

根据更严格的市场要求,Danieli Wean United在近年中开发了一种能够实现生产超薄产品的现代化技术.加拿大的Algoma钢公司和埃及的AL Ezz板带公司是成功发展此技术的两家公司.对这两家公司进行了介绍.

关键词: 灵活的薄板坯轧制 , 灵活的薄板坯连铸 , 自由凸度、自由轧制 , 带钢直接生产总厂