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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.
The use of ceramic fillers in coatings is not new. The technology has been around in excess of 15 plus years, with constant experimentation. The market acceptance of ceramic based coatings has only generally received market acceptance in the past 5 years, as performance history had to be built to back up the manufacturer's claims.
Coatings designed for heavy duty applications in the Maintenance and Protective Coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent borne.
This paper provides an overview of the Spray-applied Fire Resistant Materials and intumescent mastic materials used to protect structural steel in commercial and industrial buildings and structures. Intumescent fireproofing materials are specifically discussed including the initial testing by UL, their listings, uses, applications and inspection in the field
The polycondensation of silicate to form colloidal silica is a well-known process. Silica formation takes place through an SN2-like mechanism that involves an attack of a mono-deprotonated silicic acid molecule on a fully protonated one. Thus, monomeric silicate species produce silicate dimers, and oligomers, and eventually form colloidal silica particles. Nevertheless, this straightforward silica chemistry can be profoundly affected by the presence of certain metal cations, such as calcium, magnesium, aluminum, and iron. When such cations are present in a process water they enhance the rate of polymerization of silicate ions and induce the formation of metal silicate precipitates.
Hard spot cracking is a type of sulfide stress cracking (SSC), which is a common type of HydrogenEmbrittlement (HE). The embrittlement by SSC is attributed to the hydrogen atoms (H+), as corrosion byproduct, that permeate/diffuse through the metal with the presence of H2S. Then, when hydrogen atoms get entrapped at specific microstructural configurations, material ductility will be impaired and material will be embrittled [2].
This white paper analyzes the electromagnetic acoustic transducer (EMAT) tool performance and when combined with a multiple dataset platform, investigates the operator’s dig results from EMAT, and compares multiple inline inspection technologies used for a comprehensive seam assessment.
Zirconium alloys are used in civil nuclear reactors as fuel cladding, due to their relatively low neutron absorption cross section and being ability to maintain integrity during operation in a challenging environment – under elevated temperature, in corrosive water, under stress, and while being bombarded with different types of irradiation. In anisotropic materials, such as the hexagonal close packed Zr crystal structure, irradiation-induced defects diffuse at different rates in different crystallographic directions.
Nowadays, several engineering fields focus their attention on the use of hybrid structures. In particular, the combination of traditional materials like steel or metal alloys together with Fiber Reinforced Polymer (FRP) materials have received growing attention.1 The demand of strong light weight structures is growing stronger, especially in the transportation industry due to the need for a high strength to weight ratio as required for better performance, safety, and environmental concern. This has become an important challenge with the increase in demand due to the requirement for high strength and lightweight materials.