陇东黄土塬地区水环境中腐蚀介质分布规律及特征  

Distribution Regularity and Characteristics of Corrosive Medium in Water Environment of Longdong Loess Plateau Area

作　　者：魏晋平 边浩林 边义成 刘涛 WEI Jinping;BIAN Haolin;BIAN Yicheng;LIU Tao(Water Resources and Hydropower Investigation,Design and Research Institute of Gansu Province,Lanzhou 730000,China)

机构地区：[1]甘肃省水利水电勘测设计研究院有限责任公司,兰州730000

出　　处：《腐蚀与防护》2022年第4期19-23,64,共6页Corrosion & Protection

基　　金：国家重点基础研究发展计划(2016 YFC0401801)。

摘　　要：结合甘肃省白龙江引水工程的水化试验资料,分析水样中腐蚀性物质含量在垂向和横向的变化特征,初步判断该地区水环境中腐蚀性离子对钢结构、混凝土结构和钢筋混凝土结构中钢筋的腐蚀性。结果表明:陇东黄土塬地区主要腐蚀性离子是Cl^(-)和SO_(4)^(2-),且Cl^(-)和SO_(4)^(2-)含量随取样深度的增加而降低,水化剖面所跨河流中大多数河流腐蚀性离子含量偏高,多数水环境中腐蚀性离子对钢筋混凝土结构中钢筋具有弱腐蚀性,对混凝土结构和钢结构无腐蚀性。Combined with the hydration test results of the Bailongjiang Water Diversion Project in Gansu province,the vertical and horizontal variation characteristics of corrosive substances in water samples were analyzed,and the corrosiveness of corrosive ions in the water environment in this area to steel structures,concrete structures and steel bars in reinforced concrete structures was preliminarily judged.The results showed that the main corrosive ions in the Loess Plateau area of Longdong were Cl^(-)and SO_(4)^(2-),and the content of Cl^(-)and SO_(4)^(2-)decreased with the increase of sampling depth.The content of corrosive ions in most rivers spanned by the hydration profile was relatively high,and the corrosive ions in most water environments were weakly corrosive to the steel bars in reinforced concrete structures,but non-corrosive to concrete structures and steel structures.

关 键 词：黄土塬地区 水环境 腐蚀性 多项式拟合 特征值分析 

分 类 号：TG1744[金属学及工艺—金属表面处理]