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Testing cured coatings for flaws and defects is often a crucial part of the acceptance process for a coating assessed against its specification. This is particularly the case for pipeline and storage tank coatings and for coatings applied for corrosion protection, where discontinuities in the coating can lead to premature failure.
Testing cured coatings for flaws and defects is often a crucial part of the acceptance process for a coating assessed against its specification. This is particularly the case for pipeline and storage tank coatings and for coatings applied for corrosion protection, where discontinuities in the coating can lead to premature failure. Task groups within both ASTM and CEN (ISO) have been doing work on existing and new methods for low-voltage, wet-sponge testing and high-voltage “holiday” detection. Two ASTM test methods are being updated and a new test method is being developed within CEN for joint voting with ISO to also establish test sampling plans and acceptance/rejection criteria. The NACE recommended practise, RP0188 is also being considered for revision in 2007. This paper describes the new thinking in the area of porosity testing with particular reference to the selection of the correct test voltage for high voltage testing and the recent developments in the relevant test equipment.
This paper will address conditions assessment, test procedures and criteria necessary to make informed decisions on overcoating or not overcoating an aged coating system. It will cover rating of adhesion and film integrity, determination of overcoating risk factors and a selection process for appropriate overcoat systems.
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This presentation will compare and contrast several anti-corrosive tidal zone coatings developed under a Navy SBIR program. Requirements for the coating included no VOC’s, surface tolerance to chlorides and water, fast cure to avoid washout by tides and waves, and thick build properties. Various trials of the material on dock sheet pilings and cooling tower fallout zones will be illustrated as well as accelerated lab test data.
The purpose of this document is to introduce Corrosion Control Information Management System (CCIMS), a US Navy partnership success story used to plan maintenance on ships to include assessment tracking, data analysis facilitation, repair/overhaul work planning and future maintenance needs forecasting.