Role of Iron in the Inhibition of Corrosion of Marine Heat Exchangers — A Review
Role of Iron in the Inhibition of Corrosion of Marine Heat Exchangers — A Review
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DOI：
10.1179/000705972798323288
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发表时间：
1972-01
期刊：
影响因子：
--
通讯作者：
C. Pearson
中科院分区：
文献类型：
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作者：
C. Pearson
1907年，人们发现船用冷凝器冷却水中的铁腐蚀产物减少了管子的腐蚀。然而，尽管1924年在英国进行的深入研究进一步强调了铁腐蚀产物在减少铜基合金腐蚀方面的重要性，但直到最近才重新开放了铁的这种作用的机制方面。本文回顾了铁腐蚀产物作为缓蚀剂的历史，特别是（a）在冷却水中存在的铁腐蚀产物来自于牺牲电偶铁保护块或通过向系统中注入硫酸亚铁;（B）由作为合金元素掺入管或管板材料中的铁提供的铁腐蚀产物，特别考虑铜-锌，铜镍合金和铝青铜合金。它的结论是，虽然腐蚀抑制的实际机制取决于铁腐蚀产物的来源（从冷却水或冷凝器材料），在这两种情况下，铁成为纳入在金属表面上形成的腐蚀膜。这降低了膜的电位，使得它们不再有效地对裸金属是阴极，因此不能有助于局部电化学腐蚀电池。
It was observed in 1907 that iron corrosion products in the cooling water of a marine condenser reduced tube corrosion. However, although intensive investigations in England reported in 1924 further emphasised the importance of iron corrosion products in reducing corrosion of copper base alloys, it is only very recently that the mechanism aspects of this role of iron have been reopened. This review traces the history of the role of iron corrosion products as a corrosion inhibitor with particular reference to (a) the presence of iron corrosion products in the cooling water derived from either sacrificial galvanic iron protector blocks or by injection of ferrous sulphate into the system; (b) iron corrosion products provided from iron incorporated as an alloying element in the tube or tube plate material, considering in particular copper–zinc, copper–nickel and aluminium–bronee alloys. It is concluded that, although the actual mechanism of corrosion inhibition depends on the source of iron corrosion products (from either the cooling water or condenser material), in both instances the iron becomes incorporated in the corrosion films formed on the metal surfaces. This reduces the potential of the films so that they are no longer effectively cathodic to bare metal and therefore cannot contribute to local electrochemical corrosion cells.