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Novel Evaluation Of The Failure Of Coatings In A Marine Environment

Novel Evaluation of the Failure of Coatings in a Marine Environment
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The author previously introduced a method to evaluate protective coatings using a novel segmented cell approach. (1)  Briefly, the technique intended to monitor natural current exchange between isolated segments, coated or uncoated, to supplement visual rankings of coating performance.  The goal was to predict failure earlier than might otherwise be visible or to distinguish between coatings that had a similar visual appearance at the end of the proscribed test period.  The experimental design also allowed for the instrumented segments, which act as sensors, to be prepared and coated as intended for a real-world industrial exposure, i.e., the metallic surfaces could be abrasive blasted and painted unlike thin-film, foil-like sensors also explored for similar purposes. 

Product Number: 51322-18033-SG
Author: James A. Ellor
Publication Date: 2022
Industries: Maritime , Corrosion Monitoring and Control , Coatings
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This paper will discuss methods to evaluate the corrosion of substrates and breakdown of protective coatings subject to wet-dry cycling in natural and accelerated environments. Principally the discussion concerns the ability to monitor on-going corrosion deterioration to predict coating failure in a real-world environment without having to accelerate (i.e., artificially harshen) the environment.

This paper will discuss methods to evaluate the corrosion of substrates and breakdown of protective coatings subject to wet-dry cycling in natural and accelerated environments. Principally the discussion concerns the ability to monitor on-going corrosion deterioration to predict coating failure in a real-world environment without having to accelerate (i.e., artificially harshen) the environment.

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Nickel Based Alloy Casting Failure In Potash Production Mill

Product Number: 51322-17528-SG
Author: Bernard Peterson, Alireza Kohandehghan, Brian Wilson
Publication Date: 2022
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Potash is mined from deep underground deposits left by ancient inland seas or extracted from saltwater bodies. The typical composition of potash is 40% potassium chloride (KCl), 55% sodium chloride (NaCl) and 5% clay. About 95% of potash is used for fertilizer in agriculture; the remaining 5% is used in commercial and industrial products such as soap, water softeners, de-icers, drilling muds etc.
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Next Step To Advanced Data Analysis With Pulsed Eddy Currents

Product Number: 51322-17568-SG
Author: Donald Picard, Olivier Bellavance, Gabriel Cyr, Andréanne Potvin
Publication Date: 2022
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Pulsed Eddy Current (PEC) technology is a widely accepted inspection method now covered by several industry standards such as ISO(1) 20669, API(2) RP 583, and the new ASME(3) Section V (BPVC for Boiler and Pressure Vessel Code), article 21. PEC is a versatile inspection technology which provides an average remaining wall thickness through insulation and coatings. The technique can also be used to safely assess the minimum remaining ligament under corrosion scabs or blisters without surface preparation. PEC is resilient to liftoff variations and provides volumetric measurements of remaining material. It is capable of both detecting and assessing general corrosion on the outer surface of the pipes such as scabs and blisters, and detecting erosion or Flow Accelerated Corrosion (FAC) on the inner surface.
Picture for Nucleation And Crystal Growth Of Calcium Carbonate In The Presence Of Zn
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Nucleation And Crystal Growth Of Calcium Carbonate In The Presence Of Zn

Product Number: 51322-17700-SG
Author: Peter G. Koutsoukos, Panagiota D. Natsi, Zahid Amjad
Publication Date: 2022
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Calcium carbonate precipitation in the presence of pollutants is a carrier of importance for their transport to the sediments and for their subsequent release depending on the local microenvironment conditions. Zinc is often present in industrial waters (heat exchangers and boilers) mainly for corrosion protection. Depending on the alkalinity and calcium concentration of waters used in water intensive processes, calcium carbonate fouling is common. Moreover, among other metals, is present in natural waters together with iron and copper, where the concentration of Zn(II) may reach at levels of several ppm.
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