期刊论文

Zhu, Z.

中文

中国腐蚀与防护学报

1005-4537

2017

37

6

597-604

10.11902/1005.4537.2016.125

湖南省科技计划重点项目（2013GK2016） 河南省电力公司电力科学研究院自筹科研项目（19151209）

本校为第一且通讯机构

针对补给水中典型有机物—腐植酸,进行了350 ℃、10个浓度(0~20 mg/L)下的高压釜分解实验,并进行了350 ℃、典型浓度7.5 mg/L下间隔时间取样的分解实验,采用离子色谱仪、TOC分析仪测定高温分解后的汽、液相分解样,根据分解产物组分含量,利用电化学及微观表征(SEM,EDS,XRD等)研究了低分子有机酸+杂质离子对汽轮机材质腐蚀行为的影响。结果表明:腐植酸高温分解产物中低分子有机酸主要为乙酸、甲酸,杂质阴离子主要为SO_4~(2-),Cl~-,NO_3~-,F~-4种;其中SO_4~(2-),NO_3~-,Cl~-的存在对汽轮机叶片钢的腐蚀有明显的促进作用,但随着F-浓度的增大出现抑制作用。

Since the retrofitting of a thermal power unit for heat delivery, correspondingly, the supplied water of boiler significantly increased from ordinary 3%~5% to above 50%, thereby the conductivity of the water generally exceeded, resulting in serious acid corrosion troubles in low pressure cylinder of the steam turbine. It is known that humic acid is a typical organic substance related with corrosion troubles in the water system, thus the decomposition behavior of humic acid at 350 °C was studied in concentration range 0~20 mg/L, while decomposi...