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This work evaluated chemical and electrical stability of commercially reference electrodes in contact with sand treated with vapor-phase corrosion inhibitors (VCIs). Several types of electrodes were tested, including Cu/CuSO4, bentonite-clay clad Cu/CuSO4, and bentonite-clay clad Zn/ZnSO4.
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For reinforced concrete (RC) structures that are in drier locations but still need of cathodic protection (CP), impressed current cathodic protection (ICCP) systems are preferred. In this study, the performance of activated zinc anodes installed on dry or high resistance concrete on Florida Bridges was evaluated.
Impressed current cathodic protection (ICCP) for reinforced concrete structures has been installed on numerous bridges and wharves in Australia over the past 40 years. The exposure conditions at the majority of these bridges and wharves made them more susceptible to chloride-induced corrosion.
The ICCP systems in Australia are designed, installed and monitored in accordance with the global cathodic protection standards such as AMPP Standard SP 0290-2019, International Standard ISO 12696:2022, and Australian Standard AS 2832.5 – 2008 (R2018).
As known, ISO 15589-1 and SP0169 protection criteria refers to IR-Free potentials values to be met by applying cathodic protection to limit corrosion rate and, at the same time, to avoid overprotection: in this respect, according to the type of currents influencing the metallic structure, European standard EN 13509 proposes different measurement techniques for measuring IR Free potential.
This AMPP standard practice presents guidelines for galvanic cathodic protection (GCP) of reinforcing steel in atmospherically exposed concrete elements or structures. These guidelines are intended for owners, engineers, architects, contractors, and those concerned with the mitigation of reinforced concrete corrosion through the application of GCP systems. The information in this standard as it relates to GCP systems is intended for atmospherically exposed concrete structures and is not applicable to concrete with nonferrous reinforcement or epoxy-coated, galvanized, or other types of coated reinforcement. GCP applications for buried and submerged reinforced concrete structures are not addressed in this standard.
Potential measurements are often referred to as the ‘language’ of corrosion. They are the most fundamental process in the field of corrosion control. The purpose of potential measurements is to obtain a general idea of the ‘health’ of the cathodic protection system.
This updated NACE International standard test method specifies test methods to evaluate the performance of liquid coating systems for seawater immersion services. This test method is intended for use by facility owners and coating manufacturers.The test method covers liquid exterior protective coating systems for offshore platform steel structures, piers, docks, pilings, subsea valves, and wellheads at normal seawater temperature.
Included are four test methods—including cathodic disbondment, seawater immersion resistance, aging stability, and edge coverage—used to evaluate coating systems. The test method also includes two tables; Table 1 details fingerprinting of coating materials, and Table 2 details the test panel geometry, size, substrate material, and minimum quantity.