AMPP Store - Conference Papers

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The Effect of Different Polyaniline Types in Silicon Dioxide Containing Coatings for Carbon Steel Protection in Artificial Geothermal Brines

Product Number: 51319-13121-SG

Author: Gabriela Aristia

Publication Date: 2019

$20.00

Carbon steel is non-resistant to uniform and pitting corrosion in geothermal brines and high alloyed materials which exhibit excellent performance are relatively costly. Coating systems become an alternative to protect carbon steel from corrosion in the geothermal environment. In this research a coating system consisting of polyaniline and silicon dioxide was optimized by investigating differently synthesized polyaniline types in the coating regarding their protective effect on carbon steel. SEM images of the phosphoric acid and dodecylbenzenesulfonic acid doped polyaniline showed different morphology which suggested different physical and chemical properties. The geothermal brine found in Indonesia was simulated by an artificial solution with pH 4 containing 1500 mg/l Cl- 20 mg/l SO42- 15 mg/l HCO3- 200 mg/l Ca2+ 250 mg/l K+ and 600 mg/l Na+. Evaluation of the coating system was performed by surface analysis of the exposed specimens and electrochemical tests i.e. electrochemical impedance spectroscopy (EIS) and open circuit potential (OCP) at 150 °C with 1 MPa pressure. Visual assessment of exposed specimens with single component addition into coatings (polyaniline or silicon dioxide) showed that coatings underwent degradation. Therefore a combination of pigments addition was investigated in the tested geothermal brine to observe the improvement of corrosion protection.Key words: geothermal coating polyaniline corrosion

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The Effect of Dissolved Calcium on Sour Corrosion

Product Number: 51323-19060-SG

Author: Jon Kvarekvål, Gaute Svenningsen, Marion Seiersten

Publication Date: 2023

$20.00

A large part of the remaining natural gas reserves worldwide is sour, i.e. H2S-containing. Many oil and gas fields, especially in North America, Central Asia and the Middle East, are highly sour with an H2S fraction of several percent. Internal corrosion in sour environments is associated with a high risk of severe localized corrosion attacks.

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The Effect of Extender Pigments on Corrosion Resistance and Gloss Retention of Topcoats

Product Number: 51324-20969-SG

Author: Donald C. Lawson

Publication Date: 2024

$40.00

This study evaluates the gloss retention and corrosion resistance of different particle sized extender pigments via dispersion with various milling techniques. We examined high speed dispersion, planetary mixing, and media milling. Gloss retention and corrosion resistance were measured after accelerated testing methods that included cyclic salt fog with UV exposure (ASTM D5894) and EIS (electrochemical impedance spectroscopy) over steel and aluminum substrates. The dispersion blends were incorporated in a solvent-borne fluoroethylene vinyl ether (FEVE) resin and evaluated against commercially obtained high performance topcoats

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The Effect Of Flow Rate On Corrosion Currents From Various Aircraft Primers

Product Number: 51321-16932-SG

Author: James F. Dante

Publication Date: 2021

$20.00

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The Effect of Four Commercially Available Steel Decontamination Processes on the Performance of Internal Linings

Product Number: 41215-911-SG

Author: Michael Melancon, Paul Hunter, Amal Al-Borno, Tomasz Liskiewicz, Sherry Rao, Bassem Salamah, Shailesh Dhoke, Steve Hourcade, Julius Cortes, Xianyi Chen

Publication Date: 2015

$20.00

Internal linings used for corrosion protection often have to perform under severely corrosive environments. One major concern regarding coating performance is the negative effect of soluble salts on the steel substrate at the time of lining application, particularly for higher temperature lining applications. These salts impact the ability of the applied coating systems to protect the steel in several ways including osmotic coating blistering, promotion of under-film metallic corrosion and lining disbondment.

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The Effect of H2S Consumption on SSC Susceptibility of High Strength Wire Grades for Flexible Pipes

Product Number: 51319-13483-SG

Author: Merlin Bandeira

Publication Date: 2019

$20.00

Flexible pipes are widely used in offshore installations especially in Brazil to produce and export oil and gas. In order to guarantee safety operation in pre-salt fields without super estimate the field corrosiveness many efforts are dedicate to study the actual H2S concentration in the pipe annulus. The data presented in the literature point to a considerably lower H2S concentrations than those predicted based on traditional annulus permeation models. The consequences of these studies have direct impact on flexible pipes design suggesting the possibility to use lighter lower cost with good performance structures. However to specify correctly the armor wires is crucial to evaluate the corrosion resistance on annulus condition especially the stress corrosion cracking. The present study goal is to evaluate the corrosion performance of a range of flexible pipes armor wires considering susceptibility of SCC and HIC on laboratory simulated annulus condition. The laboratory tests were conceived to measure and compare pH H2S and Fe2+ concentration during the whole test period. The H2S flowrate was constant at 4 mL/min. All experiments were carried out at 30 oC 0.1 MPa using a gas mixture with 1% H2S in CO2. It was also controlled the ratio of liquid phase (synthetic seawater) and steel surface area (0.7 mL/cm2). The studied flow rate was 10-6 mL/min/cm2. A blank test without steel wires revealed that pH was stable at 4.9 and the maximal H2S concentration recorded was 20 ppm both after 150 h of test. On test simulating the annulus condition the pH was around 6.1 from 20 h of immersion until the end of the test (2000 h). The H2S concentration was always lower than 1 ppm and the Fe2+ concentration increased with immersion time up to 1200 ppm. Among the three high strength wire grades tested by four point bend test only one was susceptible to SCC under the conditions tested. Further studies will be presented concerning the HIC and microstructure influence on corrosion performance. The aim of this test program is to provide technical data to support future modifications on flexible pipe design with guarantee of good corrosion performance of armor wires.

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The Effect of Halides on SCC Susceptibility of Carbon Steels Used in Nuclear Waste Tanks

Product Number: 51323-18830-SG

Author: B.C. Rollins, S. Chawla, J. Gerst, J.A. Beavers, J.S. Page, C.L. Girardot, S.T. Campbell, N. Sridhar

Publication Date: 2023

$20.00

The Hanford Nuclear Reservation contains radioactive and chemically hazardous wastes arising mostly from weapons production, beginning with World War II and continuing through the Cold War. The wastes are stored in 177 carbon steel underground storage tanks, of which 149 are single-shell tanks (SSTs) and the remaining are double-shell tanks (DSTs). The U.S. Department of Energy, Office of River Protection is responsible for retrieving the tank wastes, treating them in order to encapsulate them in glass logs, and then permanently closing the tanks and associated facilities.

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The Effect of Inductive Loading on Rectifier Interruption

Product Number: 51320-14621-SG

Author: Michael M. Dockery, Stephen B. Gibson

Publication Date: 2020

$20.00

Direct current (DC) sources are a critical component of many cathodic protection (CP) systems. In order to assess the performance of these CP systems, momentary interruption of the DC current output is often utilized to help obtain true polarized potentials of protected structures1. This is achieved with a relay that is either integral to the DC current source or installed externally. Traditionally, these relays use a mechanical or mercury contactor, but solid-state relays are becoming more popular for their increased performance and reduced environmental footprint. Recent experience has indicated that interruption of current with an inductive load can damage solid state relays by momentarily exceeding their voltage rating. This has been observed by some CP technicians when they return to site to check on a previously installed interrupter, only to find it overheated and not interrupting. This study will examine the various sources of inductance in impressed current CP systems and discuss methods for mitigating the inductive effects during interruption. To demonstrate the effectiveness of these methods, an electrical circuit was created to mimic a cathodic protection circuit, and the effectiveness during interruption was measured using an oscilloscope.

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The Effect Of Interactions Between Cathodic Protection Potential And Stress Concentration On Hydrogen Embrittlement Of Precipitation-Hardened Nickel Alloys

Product Number: 51321-16663-SG

Author: Imran Bhamji; Kasra Sotoudeh; Menno Hoekstra; Herman Amaya; Bryan Fahimi

Publication Date: 2021

$20.00

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The Effect of Laboratory Atmospheric Environmental Parameters on Corrosion Fatigue Damage

Product Number: 51323-19396-SG

Author: Sarah E Galyon Dorman, Justin Rausch, Nathan Houser, Jenifer S. (Warner) Locke

Publication Date: 2023

$20.00

Age-hardenable aluminum alloys are used for many aerospace applications, where high strength and low density are required. In service, these alloys must withstand both demanding mechanical loads and corrosive environmental conditions. For components made of these alloys, problems may occur when mechanical stresses are present with a corrosive environment.

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The Effect of Long-Term Exposure Conditions on the Concrete Resistivity of Polymer-Modified Concrete Repair Mortars

Product Number: 51323-18842-SG

Author: Martin Cheytani, Sammy Lap Ip Chan

Publication Date: 2023

$20.00

In the rectification process of reinforced concrete structures, one of the primary considerations made is the selection of concrete repair methodology and repair products. The suitability of concrete repair products is determined by the structure’s function, and some of the main technical aspects which are considered include compressive strength, bond strength, shrinkage and expansion, tensile strength, chemical resistance, and flow characteristics.

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The Effect of Low Temperature Diffusional Heat Treatments on the Corrosion Resistance of Nickel Alloys

Product Number: 51320-14623-SG

Author: Daniela de Figueiredo Cavalcante, Mariana Georges M. de Carvalho, Marcella Araujo Lage, Fabio Pereira Alves, Kioshy Santos de Assis, Oscar Rosa Mattos

Publication Date: 2020

$20.00

Conventional diffusional heat treatments are usually performed when an increase on the surface hardness of a certain component is desired. However, some alloys, such as duplex stainless steels and nickel alloys cannot be submitted to the temperature ranges that these treatments require due to the precipitation of deleterious phases. Besides that, since these alloys are used in highly corrosive environments, the effect of those treatments on corrosion resistance is a point that deserves special attention.
This paper presents a study about the effect of two different diffusional heat treatments on the corrosion behavior of two nickel alloys (UNS N07718 and UNS N09925). The first one (HT#1) can be classified as a carburizing process, and the second (HT#2) as a nitriding process. Treated and untreated samples were analyzed through a corrosion test called critical pitting temperature (CPT) that was determined through an electrochemical method, according to ASTM G150, and by a chemical one, per ASTM G48. The results showed that the heat treatments presented opposite effects on the substrates. HT#1 improved the corrosion resistance of both substrates, although 925 HT#1 presented a lower CPT value by ASTM G48, which can be explained due to the test method aggressiveness, and HT#2 reduced their CPT. In all cases where pits were observed, they were macroscopic.

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The Effect of Different Polyaniline Types in Silicon Dioxide Containing Coatings for Carbon Steel Protection in Artificial Geothermal Brines

The Effect of Dissolved Calcium on Sour Corrosion

The Effect of Extender Pigments on Corrosion Resistance and Gloss Retention of Topcoats

The Effect Of Flow Rate On Corrosion Currents From Various Aircraft Primers

The Effect of Four Commercially Available Steel Decontamination Processes on the Performance of Internal Linings

The Effect of H2S Consumption on SSC Susceptibility of High Strength Wire Grades for Flexible Pipes

The Effect of Halides on SCC Susceptibility of Carbon Steels Used in Nuclear Waste Tanks

The Effect of Inductive Loading on Rectifier Interruption

The Effect Of Interactions Between Cathodic Protection Potential And Stress Concentration On Hydrogen Embrittlement Of Precipitation-Hardened Nickel Alloys

The Effect of Laboratory Atmospheric Environmental Parameters on Corrosion Fatigue Damage

The Effect of Long-Term Exposure Conditions on the Concrete Resistivity of Polymer-Modified Concrete Repair Mortars

The Effect of Low Temperature Diffusional Heat Treatments on the Corrosion Resistance of Nickel Alloys

Association for Materials Protection and Performance