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09008 Controlling the Components of Calcareous Deposit to Protect Steel Structures from ALWC with DC and Pulse Current

Picture for 09008 Controlling the Components of Calcareous Deposit to Protect Steel Structures from ALWC with DC
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Product Number: 51300-09008-SG
ISBN: 09008 2009 CP
Author: Robert A. Cottis and Khoi Tu
Publication Date: 2009
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Accelerated Low Water Corrosion (ALWC) is a particularly severe form of microbiologicallyinduced aggressive localised corrosion, which is most commonly found close to the level of the Lowest Astronomical Tide (LAT) on unprotected steel structures. As a method of controlling ALWC, the calcareous film produced on steel structures that are cathodically protected, has been studied as an inexpensive and environmentally-friendly corrosion control coating, with the intention being that the cathodic protection is applied only for so long as is necessary to develop a protective coating. When deposition are appropriately controlled, it could provide long-term corrosion protection for steel in seawater. In this work, calcareous deposits formed under impressed current cathodic protection (ICCP) using both DC and pulsed current in artificial seawater have been investigated.

Key words: ALWC, low water corrosion, calcareous deposit, endurance, cost effectiveness, environmentally-friendly, quality, DC, pulse current.
Accelerated Low Water Corrosion (ALWC) is a particularly severe form of microbiologicallyinduced aggressive localised corrosion, which is most commonly found close to the level of the Lowest Astronomical Tide (LAT) on unprotected steel structures. As a method of controlling ALWC, the calcareous film produced on steel structures that are cathodically protected, has been studied as an inexpensive and environmentally-friendly corrosion control coating, with the intention being that the cathodic protection is applied only for so long as is necessary to develop a protective coating. When deposition are appropriately controlled, it could provide long-term corrosion protection for steel in seawater. In this work, calcareous deposits formed under impressed current cathodic protection (ICCP) using both DC and pulsed current in artificial seawater have been investigated.

Key words: ALWC, low water corrosion, calcareous deposit, endurance, cost effectiveness, environmentally-friendly, quality, DC, pulse current.
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