本文選題：X管線鋼 + 近中性土壤溶液　； 參考：《鋼鐵研究學報》2017年07期

【摘要】：采用電化學技術(shù)、表面分析技術(shù)和失重法,研究了X100管線鋼在有/無SRB的近中性土壤溶液中的腐蝕過程與行為。結(jié)果表明,X100管線鋼在有/無SRB的近中性土壤溶液中的腐蝕均屬于中度腐蝕,SRB的活動與代謝影響了X100鋼的腐蝕行為,隨著腐蝕時間的增加,SRB可在X100鋼表面形成由微生物膜與腐蝕產(chǎn)物結(jié)合在一起的更加致密的結(jié)合膜,對腐蝕傳質(zhì)有一定的阻礙作用,進而減緩了X100鋼的腐蝕;而無菌時X100鋼表面的腐蝕產(chǎn)物比較疏松,厚度不均勻,對鋼基體的保護作用差,導致X100鋼在無菌溶液中的腐蝕速率大于有菌時,說明SRB具有減緩X100管線鋼腐蝕的作用。不含SRB時X100鋼的腐蝕產(chǎn)物主要為鐵的氧化物(α-FeO(OH)和Fe_3O_4),含SRB時腐蝕產(chǎn)物主要為鐵的氧化物和鐵的硫化物(Fe_3O4和FeS)。
[Abstract]:The corrosion process and behavior of X100 pipeline steel in near-neutral soil solution with and without SRB were studied by electrochemical technique, surface analysis and weightlessness method. The results show that the corrosion of X100 pipeline steel in near-neutral soil solution with and without SRB is moderate corrosion. The activity and metabolism of SRB affect the corrosion behavior of X100 steel. With the increase of corrosion time, a more compact bonding film is formed on the surface of X100 steel by the combination of microbial film and corrosion product, which has a certain hindering effect on the corrosion mass transfer, and further slows down the corrosion of X100 steel. However, the corrosion products on the surface of X100 steel are looser, the thickness is not uniform and the protective effect on the steel substrate is poor, which results in the corrosion rate of X100 steel in aseptic solution is higher than that in the sterile solution, which indicates that SRB has the function of slowing down the corrosion of X100 pipeline steel. The corrosion products of X100 steel without SRB are mainly the oxides of iron (偽 -FeOOOHand) and Fe3O4S, and the corrosion products with SRB are mainly oxides of iron and Fe3O4 and FeSof of iron.
【作者單位】： 西安石油大學材料科學與工程學院;
【基金】：國家自然科學基金資助項目(51271146) 陜西省自然科學基金資助項目(2016JQ5068) 陜西省重點學科專項資金資助項目(YS37020203) 陜西省能源化工過程強化重點實驗室資助項目(SXECPI201503)
【分類號】：TG178

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