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Laminate experiments schematics of zero resistance ammeter (ZRA) used for measuring the coupling current between the zinc strip and the steel phases
Source publication
Over the past several years, a new corrosion control technology has been developed for protecting damaged, painted galvanized, and galvannealed surfaces in contact with ambient aqueous environments. This technology, which we call electromagnetically induced corrosion control technology (EICCT), is an electronic technology that is based upon couplin...
Contexts in source publication
Context 1
... second set of experiments comprised laminated steel, epoxy, zinc, epoxy structures formed with 1.27 cm × 10.2 cm zinc foil (0.0254 mm thick) glued to coated 0.6096 m × 0.9144 m steel panels, with the zinc then being covered by a layer of two-part epoxy (Devcon or generic long-curing epoxy), as shown schematically in Figure 2. The steel panel was connected to ground, while the zinc foil was connected to ground using an insulated wire and a zero resistance ammeter (ZRA), also shown in Figure 2. In this configuration with negative feedback, the amplifier (ZRA) provides an output that drives the potential of the zinc foil to virtual ground (within a microvolt), a condition that would exist if the zinc and the steel were in ohmic contact. ...
Context 2
... second set of experiments comprised laminated steel, epoxy, zinc, epoxy structures formed with 1.27 cm × 10.2 cm zinc foil (0.0254 mm thick) glued to coated 0.6096 m × 0.9144 m steel panels, with the zinc then being covered by a layer of two-part epoxy (Devcon or generic long-curing epoxy), as shown schematically in Figure 2. The steel panel was connected to ground, while the zinc foil was connected to ground using an insulated wire and a zero resistance ammeter (ZRA), also shown in Figure 2. In this configuration with negative feedback, the amplifier (ZRA) provides an output that drives the potential of the zinc foil to virtual ground (within a microvolt), a condition that would exist if the zinc and the steel were in ohmic contact. ...
Context 3
... specimens were also equipped with Ag/ AgCl + KCl (sat) reference electrodes/Luggin probes that protruded through the specimen from the back side into a scribe on the front of the specimen that penetrated through the paint and zinc layers to the underlying steel, as indicated in Figure 2. The spray setup used in these experiments was similar to that used in the spray experiments. ...
Citations
... Automotive manufacturers throughout the world were the first to fund research & development on corrosion prevention systems utilizing the pulsed current protection (PCP) method. Recent investigations include the one undertaken by Macdonald et al [4]. They have developed an electromagnetic device that, according to their claims, functions as an antenna by activating the galvanic zinc layer to prevent corrosion of steel components on the automobile body. ...
Atmospheric metal corrosion affects the appearance and life span of iron-based metals. There are several methods for dealing with atmospheric corrosion, but none are perfectly ideal. Pulse Current Prevention (PCP) is a new method for atmospheric corrosion protection. Mild steel samples were studied using PCP for 14 days in a semi-sealed container. The pulse current is 50 Hz, 50% duty cycle, with different amplitudes of 2, 5, and 7 V. Amplitude effectiveness in the PCP technique is determined by morphological observation and image analysis technique. According to the findings, the use of pulsed current can prevent atmospheric corrosion on the steel sample. The amplitude of pulsed current has a major impact on atmospheric corrosion protection. The amplitude of 2 V is inadequate to create the necessary negative charges for steel surface protection. In the meantime, a 7 V amplitude produces overprotection, which exacerbates atmospheric corrosion deterioration. The meaningful finding is that 5 V is found to be a fairly good amplitude parameter for atmospheric corrosion prevention. Nonetheless, it needs to be investigated further to give optimal protection.KeywordsAtmospheric corrosionPulse currentAmplitudesCorrosion protection
... While hydrate is an ice-like structure formed when water molecules entrap light gas molecules under high pressure and temperature, corrosion is the destructive chemical attack upon a metallic structure by its environment. Corrosion is a common electrochemical phenomenon experienced in oil and gas production [7,[20][21][22]. As the hydrate and corrosion inhibitors show antagonistic behaviour, it is well known that the hydrate inhibitors used in pipeline result in corrosion most of the time. ...
Gas hydrate inhibitors (GHI) and Corrosion Inhibitors (CI) often tend to display antagonistic behaviour in flow assurance of oil and gas. Compatible GHI and CI that have no compromises are still under research and development. Latest researches are being done on multifunctional gas hydrate and corrosion inhibitor (GHCl). Glycerol has been tested for its inhibition performance for both hydrate and corrosion in various distinguished experiments. However, glycerol's corrosion inhibition on X52 mild steel in seawater environment has never been tested. In this work, the corrosion inhibitor property of glycerol on X52 mild steel in 3.5wt.% NaCl brine solution is investigated. The concentrations of glycerol used are 400, 600, 800, 1000, 5000, and 10000 ppm. The pH and conductivity of glycerol have been measured and the relationship between pH, conductivity and corrosion has been thoroughly discussed. The performance of glycerol has been studied further based on adsorption isotherms such as Langmuir, Frumkin, Temkin and Freundlich isotherm. The Temkin isotherm shows the best fit for adsorption isotherm with R^2 of 0.97.
As a result of growing technological advancement, the increase in input and output terminals in electronic packaging has increased significantly. This signifies the commensurate rise in the number of solder joint interconnections. Hence, for the purpose of complying with the mission and vision of the electronic industry including the manufacturing of robust, efficient, and miniaturized devices, it is essential to incorporate reinforcing components into the existing traditional lead-free solders for the requisite materials modification. This short review article documents the progress made so far in the improvement of lead-free solders with selected reinforcement. The article covers the evaluation of the reliability level of solders reinforced with three targeted categories of materials such as carbon-based nanomaterials, interlayer components, and agricultural waste.KeywordsLead-free solderReinforcementCarbon-based nanomaterialsInterlayer componentsAgricultural wasteReliability
