南水北调与水利科技
南水北調與水利科技
남수북조여수리과기
SOUTH-TO-NORTH WATER
2014年
2期
181-184
,共4页
再生水%碳钢%球墨铸铁%腐蚀速率%影响因素
再生水%碳鋼%毬墨鑄鐵%腐蝕速率%影響因素
재생수%탄강%구묵주철%부식속솔%영향인소
reclaimed water%carbon steel%ductile cast iron%corrosion rate%impact factors
在实验室内采用旋转挂片失重法分别研究了常规工艺和膜工艺处理的再生水对A3碳钢与球墨铸铁的腐蚀行为，分析了5种水质参数对腐蚀性的影响。试验结果表明，膜处理工艺生产的再生水对这两种材料的腐蚀性高于常规处理工艺处理的再生水；A3碳钢在再生水中的耐腐蚀性强于球墨铸铁；SO42-对两种材料均表现出促进腐蚀作用，且在浓度为60～120mg/L时腐蚀产物形态发生变化；Cl-对A3碳钢与球墨铸铁同样具有腐蚀促进作用，在浓度为90～120mg/L时，出现由面腐蚀向点腐蚀变化的趋势；A3碳钢与球墨铸铁在两种再生水中的腐蚀速率随碱度增加而降低，硬度在30～120mg/L时，再生水对球墨铸铁的腐蚀具有抑制作用。采用LSI和LR指数判断水质对A3碳钢与球墨铸铁的腐蚀性时，需要考虑其适用的水质类型。
在實驗室內採用鏇轉掛片失重法分彆研究瞭常規工藝和膜工藝處理的再生水對A3碳鋼與毬墨鑄鐵的腐蝕行為，分析瞭5種水質參數對腐蝕性的影響。試驗結果錶明，膜處理工藝生產的再生水對這兩種材料的腐蝕性高于常規處理工藝處理的再生水；A3碳鋼在再生水中的耐腐蝕性彊于毬墨鑄鐵；SO42-對兩種材料均錶現齣促進腐蝕作用，且在濃度為60～120mg/L時腐蝕產物形態髮生變化；Cl-對A3碳鋼與毬墨鑄鐵同樣具有腐蝕促進作用，在濃度為90～120mg/L時，齣現由麵腐蝕嚮點腐蝕變化的趨勢；A3碳鋼與毬墨鑄鐵在兩種再生水中的腐蝕速率隨堿度增加而降低，硬度在30～120mg/L時，再生水對毬墨鑄鐵的腐蝕具有抑製作用。採用LSI和LR指數判斷水質對A3碳鋼與毬墨鑄鐵的腐蝕性時，需要攷慮其適用的水質類型。
재실험실내채용선전괘편실중법분별연구료상규공예화막공예처리적재생수대A3탄강여구묵주철적부식행위，분석료5충수질삼수대부식성적영향。시험결과표명，막처리공예생산적재생수대저량충재료적부식성고우상규처리공예처리적재생수；A3탄강재재생수중적내부식성강우구묵주철；SO42-대량충재료균표현출촉진부식작용，차재농도위60～120mg/L시부식산물형태발생변화；Cl-대A3탄강여구묵주철동양구유부식촉진작용，재농도위90～120mg/L시，출현유면부식향점부식변화적추세；A3탄강여구묵주철재량충재생수중적부식속솔수감도증가이강저，경도재30～120mg/L시，재생수대구묵주철적부식구유억제작용。채용LSI화LR지수판단수질대A3탄강여구묵주철적부식성시，수요고필기괄용적수질류형。
The laboratory rotary coupon test was used to investigate the corrosion behavior of reclaimed water treated by the con-ventional process and membrane process on A3 carbon steel and ductile cast iron ,and the impacts of five types of water quality parameters on the two materials were analyzed .Experiment results showed that (1) the corrosion on the two materials of re-claimed water treated by membrane process is higher than that treated by conventional process ;(2) A3 steel has higher corro-sion resistance than ductile cast iron in the reclaimed water ;(3) SO42 - can facilitate corrosion in the two materials ,and corro-sion morphology can change when the concentration is 60~120 mg/L ;(4) Cl- has the same corrosion effects on A3 carbon steel and ductile cast iron as SO4 2 - .When the concentration of Cl - reach to 90~120 mg/L ,the corrosion trend varies from sur-face corrosion to point corrosion ;and(5) the corrosion rate of A3 carbon steel and ductile cast iron in the two types of reclaimed water decreases with the increasing of alkalinity .When the hardness of 30 ~ 120 mg/L ,reclaimed water has inhibitory effects on corrosion to the ductile cast iron .The type of water quality needs to be considered when the LSI and LR indexes are applied to evaluate the corrosion effects of water quality on A 3 steel and ductile cast iron .
