摘要
用5083F铝合金制造的船舶在海洋环境中以高速或高流速等状态运行时会受到少量腐蚀,适当的热处理可改善其耐腐蚀性能。通过硬度、转折电位、不同时效时间下的阴极极化电流密度及慢应变速率试验找到了防止腐蚀的最佳热处理条件,即在420℃下加热样品30 min,然后在水中冷却;最佳时效条件是样品在180℃下时效240 min。在海水中的慢应变速率试验(SSRT)显示,最佳条件下热处理略降低了试样的强度,但增加了伸长率和断裂时间,热处理提高了其抗腐蚀性能。
The ships made of 5083F A1 alloy will be corroded slightly during high-speed running state in marine environment, and suitable heat treatment can improve the corrosion resistance of 5083F A1 alloy. The optimal heat treatment conditions for improving corrosion resistance were obtained by hardness, turning potential, cathode polarization current density under various ageing time and slow strain rate test （SSRT） ： the samples were heated at 420 ℃for 30 rain, and then cooled in water. The optimal ageing conditions were 180 ℃ of temperature and 240 rain of ageing time. The SSRT test implied that under the optimal condition, the strength of heat-treated sample decreased slightly, but its elongation rate and time-for-rupture were improved, which indicated that the heat treatment enhanced the corrosion resistance of sample.
出处
《材料保护》
CSCD
北大核心
2017年第9期44-47,共4页
Materials Protection
