最近,美国科学家发明了一种可以保护钢材在苛刻环境中不受腐蚀的防护涂层。它曾被用来保护暴露在航天飞机发射期间排出的腐蚀性气体环境中的钢发射台。但也可用来保护其它环境中的钢铁材料。这种涂层分上下两层。第一层是将聚苯胺(一种导电性高聚物)溶解在某种溶剂中,直接喷涂在处于环境条件下的钢材上。上 Recently, U.S. scientists invented a protective coating that protects steel against corrosion in harsh environments. It was once used to protect steel launch pads exposed to corrosive gas excreted during the launch of the space shuttle. But it can also be used to protect steel from other environments. This coating is divided into two layers. The first layer is the polyaniline (a conductive polymer) dissolved in a solvent, sprayed directly in the steel under environmental conditions. on