Year: 2020 Language: English Author: Jeffrey Casciani-Wood Genre: Manual Publisher: IIMS Format: PDF Quality: eBook Pages count: 16 Description: Boat owners and marine surveyors will be familiar with common iron rust whatever form is takes. The literature on the subject of electrochemical or galvanic corrosion is enormous. However, although the phenomenon is well known to the mining and oil industries where it causes millions of dollars worth of damage annually, biological attack is not so widely understood in the marine world. Macrobiological attack is the phenomenon of mussels, barnacles, slimes, grasses and seaweeds attaching to a vessel hull. These items do not usually cause serious harm to the metal but they can and do slow the boat down and increase the fuel consumption. However, there is a different kind of corrosion which is also found on boat hulls, particularly those lying in water such as canals or rivers containing decaying vegetable matter. Few people are aware of the problem or realise it is caused by microbiological attack, or metal worm. Metal worm is a highly unpredictable process but the marine surveyor should realise that, under the influence of microorganisms, corrosion processes can happen in a matter of months compared to the years it would take for ordinary abiotic corrosion to reach serious proportions.
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Biological attack on iron and steel
Language: English
Author: Jeffrey Casciani-Wood
Genre: Manual
Publisher: IIMS
Format: PDF
Quality: eBook
Pages count: 16
Description: Boat owners and marine surveyors will be familiar with common iron rust whatever form is takes. The literature on the subject of electrochemical or galvanic corrosion is enormous. However, although the phenomenon is well known to the mining and oil industries where it causes millions of dollars worth of damage annually, biological attack is not so widely understood in the marine world.
Macrobiological attack is the phenomenon of mussels, barnacles, slimes, grasses and seaweeds attaching to a vessel hull. These items do not usually cause serious harm to the metal but they can and do slow the boat down and increase the fuel consumption. However, there is a different kind of corrosion which is also found on boat hulls, particularly those lying in water such as canals or rivers containing decaying vegetable matter. Few people are aware of the problem or realise it is caused by microbiological attack, or metal worm.
Metal worm is a highly unpredictable process but the marine surveyor should realise that, under the influence of microorganisms, corrosion processes can happen in a matter of months compared to the years it would take for ordinary abiotic corrosion to reach serious proportions.
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