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A discussion on the issues and challenges related to surface preparation in the field. As means and methods diversify and structure types become more complex, challenges arise. This presentation attempts to identify some of the potential issues and challenges associated with today’s modern methods of surface preparation in the field.
A discussion on the issues and challenges related to surface preparation in the field. As means and methods diversify and structure types become more complex, challenges arise. This presentation attempts to identify some of the potential issues and challenges associated with today’s modern methods of surface preparation in the field. Some potential issues for discussion include abrasive selection, use and reuse, waste management and disposal, containment, degree of surface cleanliness, substrate type and existing condition, zone painting vs. full rehabilitation and scheduling conflicts
Power tool cleaning has been a common method of surface preparation prior to coating application since the dawn of steel shipbuilding. Power tools are usually handheld pneumatic, or sometimes electric, devices that through impacting or abrasive action can remove coating and corrosion. Most commonly power tool cleaning has been used for re-work or coating repair associated with outfitting. Typically, power tools are limited to the touch up or repair of small areas or areas that cannot be accessed by bulkier equipment such as abrasive blasters.
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The coatings industry is very familiar with shot/grit blasting as a mechanical means of surface preparation. Over the years, operators have worked with manual and automatic blast equipment with its associated dust collection arrangements. The industry is highly competitive, and control on operating costs is critical. Therefore, coaters are always on the lookout for ways to tune their process by lowering costs and increasing productivity.
Coating performance and longevity is highly dependent on the quality of substrate surface preparation. The effect of profile height, profile type (e.g., type of tool used to perform the prep, angularity of profile, etc.), extent of cleanliness, and amount of chloride contamination on coating performance were all studied to determine the correlation between these factors in an attempt to identify the primary factor in coating failure due to improper surface preparation.