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January 10 - January 16, 2011

Is grinding the only way to remove large areas of a silicone coating from a ship's hull to replace the silicone with an epoxy mastic?

Selected Answers

From Lee Edelman of CW Technical Service on February 3, 2011:
UHP water jetting is another method for the removal of silicone from a ship's hull. A test patch can be done to check if the existing anchor profile will be compatible with the coating spec. Some of the advantages of ultra high pressure water jetting are elimination of blast media recovery or removal, dust, hoppers, bulk blast units, and recycle units.

From Michael Kontodiakos of N/A on January 19, 2011:
Grinding is not the only option, as it will not provide an adequate surface profile for the epoxy coating to adhere to the substrate. An alternative method could be the use of power tools such as needle guns, or even abrasive blasting, which would satisfy the profile requirement for the epoxy coating.

From Gary Burke of Finishing Brands , America's on January 18, 2011:
No. I believe wet blasting would also suffice.

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