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The use of single component water based coatings for protection of metal substrates continues to grow due to their low odor, health and safety advantages, easy cleanup and environmental friendliness. Nevertheless, the challenge continues to find alternatives to the traditional chromate, zinc or similar heavy metal type corrosion inhibitors which tend to rely on passivation or sacrificial cathodic protection.
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When dealing with the risk of Sulfide Stress Cracking (SSC) of Oil Country Tubular Goods (OCTG) as casings and tubings, two main approaches are: either the determination of the threshold stress on a smooth tensile specimen (NACE TM0177 Method A) or the fracture toughness KISSC on a Double Cantilever Beam (DCB) specimen (NACE TM0177 Method D).Relevance of KISSC for predicting the behavior of real pipes in service has been assessed in the frame of API PRAC project Phase II.1 Hollow tensile specimens sampled in the wall of sour service seamless pipes were exposed to sour environments either on Inner Diameter (ID), Outer Diameter (OD) or both and subjected to a tensile loading (see also references
Purchase of this course includes a one-year subscription and is non-refundable. Students will have access to all course materials for a period of one year from the date of registration. All course work must be completed during this time period. Extensions or transfers cannot be granted.
Before industrial coatings are applied, critical testing must be performed during surface preparation to ensure the coatings’ designed lifecycle will be maximized. This e-Course contains 13 modules and reviews methods of surface preparation equipment, methods, and standards.
Length: 13 Hours
Exam: Upon successful completion of the end of module assessment, students will receive a printable certificate of completion and 13 PDHs.
Once a coating system has been breached, protection is afforded by the availability of inhibitors at the defect site. The onset of subsequent corrosion, therefore, is a function of inhibitor release rate, the ratio of inhibitor to aggressive ions, and consumption of inhibitor in the vicinity of the defect. The parameters affecting each of these processes must be understood in order to appropriately model the onset of corrosion for either a first principles or an empirical approach. The influence of coating properties and environmental conditions on inhibitor exhaustion is discussed below.
Cost effective and optimum pigment dispersion is the most important aspect of color and appearance of coatings. Brilliant hues and high chroma are achieved by a perfect pigment dispersion where primary pigment particles are achieved and are well stabilized in the finished paint. The dispersion process is very critical, very time consuming and cost-intensive, and consists of continuous reduction of the pigment agglomerates into smaller size aggregates, and finally into primary particles.
Geothermal energy is a promising choice for alternative energy resources due to its reliability and low CO2 emissions. One way to harness this energy, is to extract hot fluid from a geothermal well. Geothermal fluids are a complex medium with different physical and chemical properties depending on the location and depth of a geothermal well. Thus, these fluids can be corrosive to the geothermal power plant depending on the corrosivity class. The geothermal power plant consists of various parts, such as pipelines and heat exchangers. For continuous power generation, this power plant should be safe and durable. Therefore, it is important to protect the infrastructure in this environment from corrosion.
To categorize the level of corrosion internally in uncoated offshore wind turbine structures a combinationof different online monitoring systems has successfully been utilized combining findings from onlinecorrosion monitoring, continuous water level monitoring and online water quality monitoring.
This is a general outline of different types of high-performance coatings used for industrial steel structures and maintenance. We will be discussing the different types of coatings and where and when they are to be used, the make-up of these coatings, application methods, advantages/disadvantages, tolerance, and limitations. I was going to discuss the cost range of each but due to the different performance levels that each brand offers it is hard to put cost in perspective without digging into specific brands of coatings.
Cathodic protection is used in addition to organic coatings to ensure the integrity of offshore and onshore buried structures against corrosion. The cathodic protection efficiency is usually ensured by keeping the potential of the structure to be protected in a narrow range following standard recommendations such as ISO 15589-1 and/or NF EN 12954. For onshore buried structures, this potential range is limited by the protection potential Ep and the limit potential El.