Liquid metal corrosion of 316L, Fe3Al, and FeCrSi in molten Zn-Al baths
Liquid metal corrosion of 316L, Fe3Al, and FeCrSi in molten Zn-Al baths
复制标题
DOI：
10.1007/s11661-005-0325-7
复制
发表时间：
2005-08-01
影响因子：
2.8
通讯作者：
Sikka, V
中科院分区：
文献类型：
--
作者：
Liu, XB;Barbero, E;Sikka, V
进行了316L和两种金属间化合物Fe_3Al和FeCrSi在工业镀锌（Zn-0.18Al）、GALFAN（Zn-5Al）、GALVALUME（Zn-55 Al）和渗铝（Al-8 Si）镀液以及实验室规模的静态镀液中的腐蚀试验。在工业热浸镀浴中的在线测试中，316L钢在镀锌、GALFAN和GALVALUME浴中显示出比Fe 3Al更好的耐腐蚀性。316L与Fe_3Al在渗铝液中的耐蚀性相近。在静态试验中，FeCrSi在纯Zn、Zn-55 Al和Al-8 Si镀液中表现出最好的耐腐蚀性。316L的耐蚀性优于Fe 3Al。在Zn-5Al镀液中，316L在试验后没有显示厚度损失。对于相同的镀液组成，合金在工业镀液中的腐蚀速率高于静态镀液。熔池温度和化学成分在腐蚀和金属间化合物层的形成中起重要作用。提高熔池温度会加速腐蚀过程并改变金属间化合物层的性质。少量的铝通过降低锌的活性和形成缓蚀层来减缓腐蚀过程。当铝含量达到临界值后，腐蚀过程由Zn-Fe反应为主转变为Al-Fe反应为主，铝含量的增加加速了腐蚀过程。
Corrosion tests of 316L and two intermetallic compounds Fe3Al and FeCrSi in industrial Galvanizing (Zn-0.18Al), GALFAN (Zn-5Al), GALVALUME (Zn-55Al), and Aluminizing (Al-8Si) baths and lab-scale static baths were conducted. In on-line tests in industrial hot-dip baths, 316L steel shows better corrosion resistance than Fe3Al in Galvanizing, GALFAN, and GALVALUME baths. The corrosion resistance of 316L and Fe3Al is similar in Aluminizing bath. In static tests, FeCrSi shows the best corrosion resistance in pure Zn, Zn-55Al, and Al-8Si baths. The corrosion resistance of 316L is better than that of Fe3Al. In Zn-5Al bath, 316L shows no thickness loss after the test. For the same bath composition, the corrosion rates of the alloys in industrial baths are higher than those in static baths. Bath temperature and chemical composition play important roles in corrosion and intermetallic layer formation. Increasing bath temperature accelerates the corrosion process and changes the nature of intermetallic layers. A small amount of aluminum reduces the corrosion process by reducing the activity of Zn and forming inhibition layer. However, after aluminum content reaches the critical point, the dominant corrosion process changes from Zn-Fe reaction to Al-Fe reaction, and, consequently, the corrosion process accelerates by increasing aluminum content in the bath.