Germ warfare: oil contamination in offshore cranes poses a significant threat to people as well as machinery


          

刊名：Cranes Today
作者：Solve Jostein Fjerdingstad
刊号：860C0087
ISSN：0307-0018
出版年：2005
年卷期：2005, no.361
页码：31-32
总页数：2
分类号：TU6
语种：eng
文摘：Oil from offshore cranes is frequently contaminated with micro-organisms (fungus, yeast and/or bacteria), and it is common knowledge that such organisms may cause malfunction and breakdown of offshore cranes. Less well known is that some of these bacteria may constitute a hazard to human health. That is why it is important to establish not only the presence of bacteria, but also to determine the type, Having analysed 250 DNA samples, Fras has discovered around 85 different types of bacteria, both in lubricating oil and hydraulic oil, Research from the Agricultural University of Norway confirms the existence of other types of fungus and yeast in oil from the same installations. Micro-organisms cause a range of problems to machinery. They produce bio film that sticks to the surface as slime. Jets and clearances performing vital hydraulic functions are clogged and the hydrocarbons in the oil are broken down, causing degradation of lubricating quality and of viscosity. Some bacteria are also acid producers, causing corrosion on metal surfaces.



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