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This paper details a precision process for removal of coatings and preparation of the metal surface underneath for optimal chemical adhesion without damaging the metal surface or the surface profile. A precision process is required for removal of coatings around corroded surfaces, potentially defective structures, or thin-walled ligaments where abrasive removal procedures will damage the substrate. In these cases, removing metal will worsen or cause a defect where replacement is expensive. A precision tool that can safely remove the coating, allow for inspection, and enhance adhesion for recoating is needed. This type of tool would enhance existing repair technologies and eliminate the immediate need for replacement.
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This paper introduces the available technology of chemical coating removal as an alternative to mechanical coating removal by comparing and contrasting the advantages and disadvantages of each chemical coating removal technology. Due to the high cost and environmental drawbacks of mechanical methods of coating removal, chemical coating removal systems have advanced as a cost effective and environmentally friendly way to remove coatings that are highly cost effective on a per square foot basis cost comparison. The presentation will discuss all chemical coating removal technology, features and benefits.
Located on the banks of the Kanawha River surrounded by the rugged Allegheny Mountains, the gilded lead-coated copper dome of Cass Gilbert’s 1932 West Virginia State Capitol has never successfully weathered the harsh climate nor withstood the test of time. Although beautifully detailed and successful at resisting water infiltration, the dome’s appearance was problematic soon after its completion and has remained so even after four significant refinishing campaigns - in 1946, 1961, 1977 and most recently in 1988.