【摘要】 为探索氨型碱性水化学对传热管材料690TT腐蚀行为的影响，开展传热管材料690TT合金在B-Li-NH₄OH和NH₄OH两种水质下的腐蚀特性研究，分析690TT腐蚀产物释放特性，综合评价氨型碱性水质对690TT腐蚀特性的影响。研究结果表明，690TT材料与两种氨型碱性水质均具有较好的相容性。690TT在两种水质中均形成了致密的氧化膜，氧化膜由NiFe₂O₄尖晶石氧化物和少量的铁氧化物Fe₂O₃组成，相对而言690TT在NH₄OH型水质条件下的总腐蚀失重量、总腐蚀产物释放量略低于在B-Li-NH₄OH水质下，但690TT向水质释放的Ni元素总量与上述规律相反，这可能与Ni元素和氨形成络合物[Ni（NH₃）_m]²⁺有关，Ni元素释放量增加对反应堆一回路辐照场控制有不利影响。本研究结果可为氨型碱性水化学技术的设计和应用提供数据支撑。更多还原

【Abstract】 In order to clarify the influence of ammonia-type alkaline water chemistry on the corrosion behaviors of 690TT,the corrosion behavior of 690TT in B-Li-NH₄OH and NH₄OH solution were studied,the release characteristics of corrosion products from 690TT were analyzed,and the impact of ammonia alkaline solutions on corrosion behavior of 690TT was evaluated comprehensively.The results showed that 690TT was compatible with two kinds of ammonia-type alkaline water chemistry.The surface of 690TT formed dense oxide film,which was composed of NiFe₂O₄ and few Fe₂O₃ oxide film.The weight loss and corrosion releasing of 690TT in NH₄OH solution were slightly lower than those in B-LiNH₄OH solution.However,the total amount of Ni released by 690TT was contrary to the results above.It could be related to the formation of[Ni（NH₃）_m]²⁺complexes between Ni and ammonia.The increasing of Ni releasing had adverse effect on the control of the irradiation field in primary loop in PWR.The results can provide data support for the design and application of ammonia-type alkaline water chemistry.更多还原