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Humans have been building shelters since before recorded history. Throughout the ages mankind’s primary objective remains the same: to keep water out of the shelter. Water is the most aggressive combatant in the fight to protect our structures. Buildings leak for a variety of reasons.
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Having been in this coatings world for over 30 years, I have seen many, many coating failures. I remember in my SSPC & NACE certification courses listening to the grizzled vets tell their “old war stories”. Now, I have my own, three of which I am going to share with you.
International standards, both ISO and ASTM, require that the attributes exhibited during an adhesion test are recorded as part of the results. What are these attributes, how should they be recorded and what value are they to the inspector and applicator in assessing the reason for failure? This paper looks at all these questions and asks should we be going further than we do in defining the mode of failure.
In our world of protective coatings, water usually seems to cause trouble. In relation to coating concrete - determining how wet the manhole structure is paramount in our struggle to rehabilitate these manholes. And we are not talking about the manholes used to contain water during heavy rains or floods, strictly the sanitary manholes. A few ASTM test methods are important tools.
A holiday is defined as a pinhole or discontinuity in a coating lining. These discontinuities are frequently very small and not readily visible and create a pathway for oxygen and an electrolyte to cause deterioration of the underlying substrate. These defects will tend to reduce the life expectancy of a coating in service, particularly if the service is to include immersion, such as the lining of a tank or a pipe.
There are many products which protect structural steel from corrosion. There is also an intense focus on sustainability. Hot-dip galvanizing is one product that provides economical, long-lived, and sustainable corrosion protection. It is also more durable than most other barrier systems. Not all steel can be galvanized because sometimes the elements are too long and/or too heavy to be placed in the baths.
In linepipes for transportation of natural gas, suppression of hydrogen induced cracking (HIC) caused by H2S contained in the transportation medium is an important issue. HIC is a phenomenon in which hydrogen atoms generated by a corrosion reaction penetrate steel and are accumulated in the central segregation part and inclusions in the steel, internal pressure is increased by gasification, and finally cracks occur.
The rapid curing and rapid project completion characteristics of reinforced inorganic zinc and polyaspartic ester technology enables new windmills to receive two-coat systems and be ready for shipment within 12 hrs. Significant cost reduction and optimization of life cycle costs are achieved for both new construction and maintenance projects using this technology.
The difference between winning and losing a job is rarely about price. To consistently win the job, contractors must develop a system that allows you to take charge of the bidding process.
To introduce the features and benefits of wireless abrasive blasting technology on today’s modern mobile blast recovery equipment.
For decades, many asset owner/operators across the O&G value chain (and other critical industry segments) of upstream, midstream, & downstream have struggled to identify the root cause of fluctuating corrosion/erosion rates due to unreliable or infrequent data during various operating intervals on their most valuable of assets. This key missing data point has forced mechanical integrity teams, corrosion engineers, inspectors, and operations to, in many cases, make the best guess or hypothesize how to operate with a limited data set of information. In almost all cases, a time-based inspection or maintenance interval is used to gauge the useful lifetime of assets based on this limited data simply because these assets couldn’t give their owners a real-time health diagnostic of how they were doing … until now.