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Picture for Gypsum Scale Inhibitors Performance in the Presence of Impurities
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Gypsum Scale Inhibitors Performance in the Presence of Impurities

Product Number: 51321-16707-SG
Author: Zahid Amjad
Publication Date: 2021
$20.00
Picture for Hexacyanoferrate-Intercalated Layered Double Hydroxides As Nano-Additives For Detection Of Early-Stage Corrosion Of Steel
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Hexacyanoferrate-Intercalated Layered Double Hydroxides As Nano-Additives For Detection Of Early-Stage Corrosion Of Steel

Product Number: 51321-16740-SG
Author: M. Wilhelm; M. Reyes; A. Sushkova; J. Yang; B. Wabende; M. Pilz; R. Martins; S. Loureiro; C. Simon; J. Tedim
Publication Date: 2021
$20.00
Picture for High Level Corrosion Risk Assessment Methodology For Refined Hydrocarbon Products
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High Level Corrosion Risk Assessment Methodology For Refined Hydrocarbon Products

Product Number: 51319-13047-SG
Author: Mushaid Nauman
Publication Date: 2019
$20.00

Assessing corrosion risks and developing inspection and mitigation measures forms a vital part of any Asset Integrity Management (AIM) system. Improving asset reliability is crucial as the risks attached with the asset failure can be catastrophic in terms of human life environment and monetary loss. Knowledge about the asset degradation mechanisms affects critical decisions regarding maintenance inspection regimes and investment plans. Typically less than 10% of assets carry 95% of the risk thus making higher knowledge of individual “asset” integrity key to minimizing risk across any one business system. Achieving this highest possible performance of an asset against the lowest possible costs whilst ensuring safe operation is a challenge faced by many operators. Most of the emphasis from operators is given to upstream and processing facilities that hold a valid high in service deterioration risk because they face harsh and corrosive conditions. However the facilities installed downstream in particular the storage and transport of refined hydrocarbon products are often considered in the same “fit and forget” philosophy. Operators often apply makeshift solutions in case of any failure but problems can recur which besides denting the operational excellence can affect the environment and safety.Refined hydrocarbon products such as Jet A1 LPG and ULG 91/95 etc. are not generally corrosive to the metals and alloys that are used for their storage and transport; however they do contain dissolved water organic sulphides and oxygen containing compounds that can cause corrosion over the time. Conventional corrosion prediction models are not relevant since the acid gases are not present. In order to overcome this limitation and to allow corrosion risk assessment of both existing and aging facilities an alternative in-house corrosion risk assessment methodology has been developed. This methodology helps in order to dilute the corrosion risks associated with these facilities in a well-structured process as practiced for one of the major operators in the Middle East. This paper discusses the methodology used to model the corrosion rates and risk assessment involving both probability and consequences within these product streams.Key Words: jet A1 unleaded gasoline (ULG) liquefied petroleum gas (LPG) oxygen flowrate carbon dioxide (CO2) hydrogen sulphide (H2S)

Picture for High Resolution CT Scan as Tool for Precise Quantification of Material Loss due to Localized Corrosion in Brake Calipers
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High Resolution CT Scan as Tool for Precise Quantification of Material Loss due to Localized Corrosion in Brake Calipers

Product Number: 51321-16467-SG
Author: Marco Bandiera/Andrea Bonfanti/Federico Bertasi/Alessandro Mancini
Publication Date: 2021
$20.00
Picture for High Sensitive Sensors for Collection of Cathodic Polarization Data and Determination of Protection Potential Criteria of Buried Structures
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High Sensitive Sensors for Collection of Cathodic Polarization Data and Determination of Protection Potential Criteria of Buried Structures

Product Number: 51319-12896-SG
Author: Erwan Diler
Publication Date: 2019
$20.00

The installation of metallic coupons in the vicinity of buried pipes under cathodic protection (CP) allows theoretically to measure the potential and the current density through the simulated coating defect. Nevertheless this type of monitored coupon does not provide direct information on the actual efficiency of the CP and corrosion rates that could be caused by a CP failure over time or not adapted CP design. According to the soil resistivity and the corrosion potential in absence of CP a protection potential is generally targeted following the standard recommendations. However the soil resistivity as well as the corrosion potential might depend on the seasonal fluctuations and the protection potential might vary as function of the considered standard. Moreover all soils parameters cannot be considered in recommendations from standards and cathodic protection criteria can be sometimes debatable.In this study very sensitive electrical resistance (ER) sensors allowing obtaining precise corrosion data in real-time were adapted for soil applications. They were used in the selected soils and conditions to determine the off potential and current density corresponding to a corrosion rate of 10 µm/year which corresponds to the maximal corrosion rate of buried structures considered as protected according the standard ISO 15589-1:2015. The adapted ER sensors appeared to be particularly suitable for determining the protection potential and CP criteria in a relatively short time. For the tested soils and conditions the results showed that the cathodic protection criteria recommended in ISO 15589-1: 2015 are conservative compared to those measured experimentally. This method therefore seems particularly relevant for the determination of the protection potential in complex or polluted media in the absence of data in the literature.