中国科技论文
中國科技論文
중국과기논문
Sciencepaper Online
2014年
2期
178-182
,共5页
马胜强%高圆%刘广柱%宁奇愚%邢建东%王勇%许刚
馬勝彊%高圓%劉廣柱%寧奇愚%邢建東%王勇%許剛
마성강%고원%류엄주%저기우%형건동%왕용%허강
铁硼合金%锌%流速%冲蚀%界面%形貌
鐵硼閤金%鋅%流速%遲蝕%界麵%形貌
철붕합금%자%류속%충식%계면%형모
iron boron alloys%zinc%flow velocity%erosion%interfaces%morphology
采用圆盘旋转技术,研究了锌液流速对Fe-B合金耐锌液冲蚀性能和冲蚀界面形貌的影响。在锌液温度和冲蚀角度一定时,随锌液冲蚀速度的增加,与316L不锈钢相比,Fe-3.5B (质量分数,%)合金的冲刷腐蚀率呈现较为缓慢的线性增加趋势,表现出低的锌液冲蚀率。在较低的锌液冲蚀速度下,Fe-B合金的冲蚀率仅为316L不锈钢的1/3,传质过程主要通过锌液在Fe2 B网状间隙中的物理流动而进行;而在较高的锌液冲蚀速度下,Fe-B合金的冲蚀率远低于不锈钢,表现出更优异的抗锌液冲蚀性能,此时的传质方式主要是铁、锌原子在界面前沿直接的扩散反应。界面形貌分析表明,Fe-B合金良好的抗锌液冲蚀性能得益于冲蚀初期基体快速腐蚀所产生的界面前沿裸露、密集Fe2 B抗蚀骨架对流动锌液良好的隔离、阻挡效应。
採用圓盤鏇轉技術,研究瞭鋅液流速對Fe-B閤金耐鋅液遲蝕性能和遲蝕界麵形貌的影響。在鋅液溫度和遲蝕角度一定時,隨鋅液遲蝕速度的增加,與316L不鏽鋼相比,Fe-3.5B (質量分數,%)閤金的遲刷腐蝕率呈現較為緩慢的線性增加趨勢,錶現齣低的鋅液遲蝕率。在較低的鋅液遲蝕速度下,Fe-B閤金的遲蝕率僅為316L不鏽鋼的1/3,傳質過程主要通過鋅液在Fe2 B網狀間隙中的物理流動而進行;而在較高的鋅液遲蝕速度下,Fe-B閤金的遲蝕率遠低于不鏽鋼,錶現齣更優異的抗鋅液遲蝕性能,此時的傳質方式主要是鐵、鋅原子在界麵前沿直接的擴散反應。界麵形貌分析錶明,Fe-B閤金良好的抗鋅液遲蝕性能得益于遲蝕初期基體快速腐蝕所產生的界麵前沿裸露、密集Fe2 B抗蝕骨架對流動鋅液良好的隔離、阻擋效應。
채용원반선전기술,연구료자액류속대Fe-B합금내자액충식성능화충식계면형모적영향。재자액온도화충식각도일정시,수자액충식속도적증가,여316L불수강상비,Fe-3.5B (질량분수,%)합금적충쇄부식솔정현교위완만적선성증가추세,표현출저적자액충식솔。재교저적자액충식속도하,Fe-B합금적충식솔부위316L불수강적1/3,전질과정주요통과자액재Fe2 B망상간극중적물리류동이진행;이재교고적자액충식속도하,Fe-B합금적충식솔원저우불수강,표현출경우이적항자액충식성능,차시적전질방식주요시철、자원자재계면전연직접적확산반응。계면형모분석표명,Fe-B합금량호적항자액충식성능득익우충식초기기체쾌속부식소산생적계면전연라로、밀집Fe2 B항식골가대류동자액량호적격리、조당효응。
Effects of liquid zinc erosion velocity on erosion-corrosion performance and interfacial morphologies of Fe-B alloy with 3 .5%B in flowing liquid zinc bath have been investigated by using the rotating-disc technique.The results show that the erosion rate of Fe-B alloy in flowing liquid zinc bath linearly increases very slowly with the increase of erosion velocity of liquid zinc at cer-tain bath temperature and flowing liquid zinc erosion angle compared with 316L stainless steel.In initial small erosion-velocity state,the erosion rate of Fe-B alloy in flowing liquid zinc is one third of erosion rate for that of 316L stainless due to the flowing state of liquid zinc among Fe2 B skeleton of Fe-B alloy,while the high erosion velocity of liquid zinc results in a rapid interfacial re-action of iron matrix of Fe-B alloy and liquid zinc,which leads to the bigger differences of erosion rate between Fe-B alloy and 316L stainless steel in flowing liquid zinc.Interfacial morphology analysis indicates that the better erosion-corrosion performance of Fe-B alloy in flowing liquid zinc could be attributed to the barrier effect of dense netlike Fe2 B skeleton overlaid at the erosion in-terface formed from fast reaction of iron matrix of Fe-B alloy and liquid zinc at the initial liquid zinc erosion-corrosion stage.