Corrosion under insulation (CUI) is a long-time problem in petrochemical, refinery, and marine environments, and is estimated to be 40-60% of piping maintenance costs in the oil and gas industry, in addition undetected CUI on pipes carrying hazardous liquids may lead to leaks and potential explosions. To tackle this dangerous and costly problem, Cortec® Corporation has developed CorroLogic® CUI Inhibitor Injection, a new vapor phase Corrosion Inhibitor technology that simplifies protection for insulated pipes covering a high range of temperatures.
CUI happens when moisture and other corrosive media enter insulation after wraps or jackets are compromised, or when condensation builds up, often unnoticed, beneath the insulation. This is especially a problem for piping that undergoes wet-dry, or high-low temperature, cycling. The threat of CUI is potentially even greater on offshore platforms, or in other marine environments where chloride-rich sea spray can infiltrate the insulation. According to the company, CorroLogic® CUI Inhibitor Injection, a new high-temperature 100% Vapor phase Corrosion Inhibitor (VCI/VpCI®) is available to protect against corrosion under insulation (CUI). As its name implies, CorroLogic® CUI Inhibitor can be injected directly into insulating material.
The corrosion inhibiting vapour migrates from the injection point along the pipe to form a hydrophobic protective layer on metal surfaces beneath the insulation. This passive layer is long-lasting, and could protect the surface in the presence of chloride-containing moisture, and withstand high temperatures up to 350 °C, concluded the company. In addition to preventing CUI, the company also claims the technology can also be used for the corrosion protection of aboveground storage tanks, and void space protection.
A recent article describes the effects of epoxy binder, curing agent, filler, initial solvent concentration, curing temperature, and relative humidity, on the curing-induced internal stress in epoxy coatings.
According to the report, curing-induced internal stresses in epoxy coatings are highly influenced by the type and concentration of their ingredients, and the conditions applied. In this new work, the effects on the internal stress development of the epoxy/crosslinker chemistry, curing temperature, relative humidity, filler conditions, and initial solvent concentration, were studied. An elevated curing temperature (35 or 45 °C) resulted in a smaller elastic modulus and, despite an accelerated curing reaction and a higher final reactant conversion, only a slight increase, around 0.2 MPa, in the average internal stress. An increased relative humidity (from 35 to 60 %), also resulted in a smaller elastic modulus and less volumetric shrinkage and internal stress. However, at 90 % relative humidity, the internal stress, due to an enhanced final reactant conversion, was higher than observed at 60 % RH.
The study noted that the presence of either BaSO4 or CaCO3 filler in the formulation reduced the final reactant conversion and volumetric shrinkage, but resulted in a higher elastic modulus and internal stress. 0.6 MPa.
The study presents guidelines to optimise coating formulations and curing conditions to avoid internal stress.
The study was published in Progress in Organic Coatings, Volume 173, December 2022.
The World Coatings Council has announced the publication of its inaugural report on “Sustainability in the Global Paint & Coatings Industry.”
The report highlights the global industry’s ongoing sustainability efforts to advance technologies in coating science and manufacturing, while minimising impacts on human health and the environment. The report emphasises the critical role coatings and the global industry play in contributing to the United Nations’ Sustainable Development Goals (SDGs).
The report also emphasises that coatings are essential to making products and our built infrastructure more sustainable by providing resistance and durability; providing critical performance properties for safe and healthy communities; and serving a critical role for applications in the health and food sectors, among many others. It also highlights the industry’s efforts to achieve resource efficiency in production processes, consideration of raw material consumption, and implementation of health and safety measures to ensure decent work and economic growth.
The report can be found at the Website of the World Coatings Council, https://worldcoatingscouncil.org/WCC-Sustainability-Report/#page=1
Researchers at Bournemouth University have developed and patented a new corrosion sensor that they say could improve safety and reliability of large structures including bridges and pipelines, as well as vehicles and machinery.
According to the University, the sensor can detect defects and risks in infrastructure at a much earlier stage than the methods currently used, and could therefore result in reduced costs as well as improved safety.
This sensor works on the same principal as health screenings, ie aims spot “health” risks in vehicles and mechanical structures before corrosion reaches an advanced and dangerous stage, and could avoid costly, lengthy repairs, and hopefully prevent structures from being scrapped altogether, continued the University.”
Other industrial corrosion sensors require cables to be plugged in to a computer, which requires someone in site during maintenance. The device is wireless so it can be attached to a structure and its readings can be continuously monitored off-site.
The technology has reportedly been granted patents in the United Kingdom and the United States. Professor Khan and his team state they are keen to work with partners to roll it out across industry, engineering, and construction companies.
More information can be found at,
The implementation of digital monitoring systems for occupational safety and health (OSH) such as apps, cameras and wearables can make workplaces safer. Whether the objective is proactive (prevention) or reactive (mitigation), their success often hinges on the accuracy of the information they collect and analyse. It is just as important to equip employers and workers with the information they need to weigh up the advantages and disadvantages, and to facilitate a good implementation.
Two new reports explore the challenges and opportunities of smart digital monitoring systems for OSH. One report delves into the types, purposes, and uses of digital monitoring systems. The second presents best practice examples to successfully integrate new monitoring systems at the workplace.
These reports, can be found at, https://osha.europa.eu/en
Well established online training company, Corrodere Academy, are now offering Pipeline Coating Inspector and Insulation Inspector courses with ICorr accreditation.
Corrodere Academy offer globally recognised qualifications in the protective coatings industry including Train the painter, coating inspector and specialist courses. This is the first time ICorr accredited Pipeline and Insulation Inspector courses have been available online, saving students 50% of time and money in comparison to classroom learning.
The importance of monitoring pipelines
Pipelines are energy lifelines, making almost every daily activity possible. They play a huge role in our everyday lives and are essential to the world’s industries. The world’s transportation would come to a complete stoppage without them as
they carry everything from oil and gas to fresh water.
Course content includes an overview of the pipeline industry, pipeline corrosion, cathodic protection and coatings, quality assurance and control, safety, and pipeline inspector duties, recommended practices and international standards and environmental considerations.
This qualification opens extensive career opportunities in the oil and gas, subsea, fresh water, diesel and petrol and jet
fuel industries.
The importance of monitoring insulation
One of the hottest topics in the protective coatings industry, insulation has been used for centuries to keep heat in and cold out or vice versa. The energy saving and environmental benefits that come from proper insulation are hugely significant. By making buildings and process systems more energy efficient, insulation helps reduce the amount of fossil fuel combustion needed to heat and cool homes, businesses, and factories. That, in turn, decreases the amount of carbon dioxide emitted into the atmosphere.
Course content includes a history of insulation systems, corrosion under insulation, insulation design, standards and specification, quality assurance and control, safety and insulation inspector duties, insulation application and conducting coating surveys.
These distance learning courses, when completed satisfactorily, lead a certificate of achievement accredited by ICorr, which is valid for 5 years.
For more information, contact
the team on 01252 732233 or
info@corrodere.com
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