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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.
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Coatings are applied to steel elements exposed in natural waters to mitigate the deleterious effects of naturally occurring physical-, chemical-, and biodegradation processes. Degradation of steel submerged in natural waters can occur due to corrosion and marine fouling. Recent findings indicated that there are synergistic effects of surface fouling to facilitate biocorrosion.
A new software system has been developed to allow a plan to be created for the inspection tasks associated with the coating processes for a steel structure. This system uses a coatings library to create the coating systems that are to be applied to various user-defined zones of the structure. These zones are identified on a schematic drawing of the structure and then the coating systems and inspection regimes that are required can be associated with these zones.
Dimensional Profiling is a new prospective of applying sustainable non-slip characteristics to the surface of polymeric flooring and coating systems. Over the last three decades, it has been commonplace in the industry to provide a single nonslip media profile.
In this paper, a new concept named CP by distributed sacrificial anodes (DSA) is presented. The main principle of CP by DSA is to convert cathode area to anode area by distributing anode mass over the surface of the equipment to be protected.
Departmant of Defense Specifications/standards for the prevention and control of corrosion in the aerospace field.
PA2 was initially developed when the only instruments available were the Banana gauge and basic analogue and digital DFT gauges. Gauges now have memory, limits and scanning technology amongst other features. Scanning technology in DFT measurement has been available for some time now, but only recently has work begun on the standards to incorporate this technology.
The use of passive intumescent fireproofing solutions to meet life & safety goals for commercial structures continues to grow in number annually. More often facility owners are required to incorporate fire proofing protection for up to three hours in order to assure the safe departure of individuals inside the given building in the event of an emergency.
The hot-dip galvanizing on steel components is a very reactive material that is often given a surface treatment to inhibit oxidation from exposure to moisture and other constituents in the atmosphere. These treatments are referred to as “passivation treatments” and are applied to the zinc surfaces during the quenching process or soon after and before the surfaces begin to oxidize.
Many times, concrete coating projects are approached similarly to those of other paintable substrates, like steel or wood. The primary and sometimes only, focus is to provide a visibly clean and sound surface. More experienced design professionals will ensure that voids are filled, protrusions are ground to plane, and the correct surface profile is achieved. Once prepared, a serviceable coating system is applied (always as per the manufacturer’s recommendations) and no one looks back… unless there is a failure.
That's a pretty audacious title, isn’t it? I’m going to show you how to take the best of the old methods, stir in some of the new media, and stand out as a coating professional. Distinctly different from the wanna-be’s and the willnever-be’s so the whole process of getting jobs becomes automatic and easy.
This paper outlines the aggressive service conditions experienced by wellhead casings and the resulting failures seen to date in the Alberta oil patch. Deleterious in-service conditions include; high temperatures and significant temperature fluctuations, expansion and contraction of the steel substrate, and the wet and dry oxidizing micro-environment, the influence of concrete, and a plethora of chlorides and other contaminants elevating the corrosion rate. Previous corrosion mitigation programs and current inspection techniques are reviewed.