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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.
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Corrosion under insulation (CUI) is a widespread corrosion phenomenon in many industries since it was first described in 1965. CUI generally occurs when moisture is retained within thermal insulation and metal interface and when the protective coating breaks down. Improper installation and eventual damage to metal jacketing act as an entry point for water. The rate of CUI can be further accelerated depending on the amount of leached corrosive species and the operating parameters.
Provides a procedure for electrical detection of minute discontinuities in coating systems that are liquid-applied to conductive substrates other than pipelines.
Defines Thorough Cleaning (WJ-3) degree of surface cleanliness of metallic substrates by use of waterjet cleaning. One of four (Clean to Bare Substrate, Very Thorough, Thorough, Light).
Tensile pull-off adhesion testing is becoming a more frequent specification requirement for in situ quality assurance testing to confirm proper surface preparation and adhesion of high performance protective linings applied to concrete. It is also becoming a widely used test for forensic analysis of protective linings in existing installations. There have been numerous investigations leading to the development of different devices and test pull-off adhesion methods used to assess bond strengths of mortars and overlay materials