表面技术
錶麵技術
표면기술
Surface Technology
2015年
9期
89-95
,共7页
杨夏琼%陈朝轶%李军旗%权变利
楊夏瓊%陳朝軼%李軍旂%權變利
양하경%진조질%리군기%권변리
硫腐蚀%钢材%氧化铝生产%碱性腐蚀%高硫铝土矿%铝酸钠溶液
硫腐蝕%鋼材%氧化鋁生產%堿性腐蝕%高硫鋁土礦%鋁痠鈉溶液
류부식%강재%양화려생산%감성부식%고류려토광%려산납용액
sulfur corrosion%steel%alumina production%alkaline corrosion%high-sulfur bauxite%sodium aluminate solution
硫对钢材的腐蚀是石油化工行业、造纸工业及氧化铝生产行业面临的一个普遍问题。研究表明,纯氢氧化钠溶液中S2-质量浓度达到5 g/L时,3.5 mm厚的CT20碳钢的腐蚀寿命只有6 h,且16Mn钢在含有5 g/L的S2-的铝酸钠溶液中腐蚀速率高达151.21 mm/a。综述了碱性条件下S2-,S2 O2-3,SO2-3和SO2-4等4种形态的硫对钢材腐蚀的研究现状,重点阐述了苛碱条件下S2-对钢材腐蚀的研究进展。拜耳法是高硫铝土矿生产氧化铝的常用方法,在生产过程中,硫以S2-,S2 O2-3和少量SO2-3,SO2-4的形态转入铝酸钠溶液,给生产设备带来严重的腐蚀危害。目前,铝酸钠溶液中硫对钢材腐蚀的研究报道较少,尤其是各种形态的硫在铝酸钠溶液中同时存在时对设备材质具有耦合腐蚀效应：当向5 g/L S2-的铝酸钠溶液中加入5 g/L的S2 O2-3时,16Mn钢的腐蚀速率由151.21 mm/a迅速下降至8.66 mm/a。最后,对耦合腐蚀机理的研究进行了展望。
硫對鋼材的腐蝕是石油化工行業、造紙工業及氧化鋁生產行業麵臨的一箇普遍問題。研究錶明,純氫氧化鈉溶液中S2-質量濃度達到5 g/L時,3.5 mm厚的CT20碳鋼的腐蝕壽命隻有6 h,且16Mn鋼在含有5 g/L的S2-的鋁痠鈉溶液中腐蝕速率高達151.21 mm/a。綜述瞭堿性條件下S2-,S2 O2-3,SO2-3和SO2-4等4種形態的硫對鋼材腐蝕的研究現狀,重點闡述瞭苛堿條件下S2-對鋼材腐蝕的研究進展。拜耳法是高硫鋁土礦生產氧化鋁的常用方法,在生產過程中,硫以S2-,S2 O2-3和少量SO2-3,SO2-4的形態轉入鋁痠鈉溶液,給生產設備帶來嚴重的腐蝕危害。目前,鋁痠鈉溶液中硫對鋼材腐蝕的研究報道較少,尤其是各種形態的硫在鋁痠鈉溶液中同時存在時對設備材質具有耦閤腐蝕效應：噹嚮5 g/L S2-的鋁痠鈉溶液中加入5 g/L的S2 O2-3時,16Mn鋼的腐蝕速率由151.21 mm/a迅速下降至8.66 mm/a。最後,對耦閤腐蝕機理的研究進行瞭展望。
류대강재적부식시석유화공행업、조지공업급양화려생산행업면림적일개보편문제。연구표명,순경양화납용액중S2-질량농도체도5 g/L시,3.5 mm후적CT20탄강적부식수명지유6 h,차16Mn강재함유5 g/L적S2-적려산납용액중부식속솔고체151.21 mm/a。종술료감성조건하S2-,S2 O2-3,SO2-3화SO2-4등4충형태적류대강재부식적연구현상,중점천술료가감조건하S2-대강재부식적연구진전。배이법시고류려토광생산양화려적상용방법,재생산과정중,류이S2-,S2 O2-3화소량SO2-3,SO2-4적형태전입려산납용액,급생산설비대래엄중적부식위해。목전,려산납용액중류대강재부식적연구보도교소,우기시각충형태적류재려산납용액중동시존재시대설비재질구유우합부식효응：당향5 g/L S2-적려산납용액중가입5 g/L적S2 O2-3시,16Mn강적부식속솔유151.21 mm/a신속하강지8.66 mm/a。최후,대우합부식궤리적연구진행료전망。
Sulfur corrosion of steel is a universal problem in petroleum chemistry industry, paper and pulp industry, and alu-mina production industry. It has been proved by studies that the corrosion life of 3. 5 mm thick CT20 carbon steel was only 6 hours when it was in sodium hydroxide solution with 5 g/L S2-, and the corrosion rate of 16Mn steel was as high as 151. 21 mm/y when it was in sodium aluminate solution with 5 g/L S2-. The current research status of 4 forms of sulfur ( S2-, S2 O2-3 , SO2-3 , SO2-4 ) cor-rosion of steel in alkaline solution was reviewed in this paper, and the research progress of S2-corrosion of steel in alkali conditions was discussed particularly. Bayer process is the common method of alumina production with high-sulfur bauxite, during the pro-gress, sulfur is transformed into sodium aluminate solution in the forms of S2-, S2 O2-3 and smaller amounts of SO2-3 , SO2-4 , leading to serious corrosion of the production equipment. At present, sulfur corrosion of steel in sodium aluminate solution is seldom repor-ted, especially the coupled corrosive effects of different forms sulfur on equipment material when they coexist in sodium aluminate solution:the corrosion rate of 16Mn steel was dramatically reduced to 8. 66 mm/a from 151. 21 mm/a when 5 g/L S2 O2-3 was added into sodium aluminate solution with 5 g/L S2-. Finally, study on the mechanism of coupled corrosion was prospected.
