Menu
Search
Filters
Close
Menu

Evaluation of Coatings to Improve Steel Compatibility in Supercritical CO2

Picture for Evaluation of Coatings to Improve Steel Compatibility in Supercritical CO2
Available for download

Supercritical CO2 (sCO2) has many attractive features as a working fluid including its low critical point (31°C/73.8 bar) and the reduced work of compression compared to an ideal gas. Thus, it is being explored for many different applications including fossil, nuclear, geothermal, concentrating solar power (CSP) and waste heat recovery. However, CO2 environments are known to carburize steels6-20 which limits their usage to lower temperatures (450°C21 for 9%Cr steels) than in steam boilers.

Product Number: 51323-19207-SG
Author: B. A. Pint, R. Pillai, J. R. Keiser
Publication Date: 2023
$0.00
$20.00
$20.00

The use of a direct-fired supercritical CO2 (sCO2) power Allam cycle could revolutionize fossil energy as a low-emission power source. However, the carburizing sCO2 environment may limit the use of lower cost steels in the lower temperature portions of the plant because of concerns about embrittlement. Initial studies on representative ferritic-martensitic (FM) steels and conventional and advanced austenitic steels at 450-650°C in 300 bar (30 MPa) sCO2 with and without 1%O2 and 0.1%H2O additions have indicated that sCO2 environments will have lower maximum operating temperatures compared to steam plants. In this study, pack coated steels were evaluated including chromizing and aluminizing. Initial 500-1000 h results showed some benefit of coating especially for the Cr coatings at 600° and 650°C. Characterization included measuring the post-exposure room temperature tensile properties to assess the coating effect on embrittlement typically associated with carbon ingress.

The use of a direct-fired supercritical CO2 (sCO2) power Allam cycle could revolutionize fossil energy as a low-emission power source. However, the carburizing sCO2 environment may limit the use of lower cost steels in the lower temperature portions of the plant because of concerns about embrittlement. Initial studies on representative ferritic-martensitic (FM) steels and conventional and advanced austenitic steels at 450-650°C in 300 bar (30 MPa) sCO2 with and without 1%O2 and 0.1%H2O additions have indicated that sCO2 environments will have lower maximum operating temperatures compared to steam plants. In this study, pack coated steels were evaluated including chromizing and aluminizing. Initial 500-1000 h results showed some benefit of coating especially for the Cr coatings at 600° and 650°C. Characterization included measuring the post-exposure room temperature tensile properties to assess the coating effect on embrittlement typically associated with carbon ingress.

Product tags
Also Purchased
Picture for Coatings + Proceedings 2021-ALL Papers
Available for download

(Insulation & Corrosion) Insulative Coatings - Fit for Purpose

Product Number: 17-COAT_DEC21
Author: Arin Shahmoradian
Publication Date: 2021
$20.00

Corrosion Under Insulation (CUI) is a very serious problem impacting the oil and gas, petrochemical, power and heavy industries. Due to the high costs associated with CUI, many industries have begun abandoning conventional jacket insulation. Recent advancements in trade association standards have helped engineers select, apply and inspect different types of insulative coatings in lieu of conventional jacket insulation.
Picture for A comparison among different electrochemical hydrogen charging methods tested on low alloy steels
Available for download

A comparison among different electrochemical hydrogen charging methods tested on low alloy steels

Product Number: 51323-18866-SG
Author: Luca Paterlini, Luca Casanova, Giorgio Re, Marco Ormellese, Fabio Bolzoni
Publication Date: 2023
$20.00

Atomic hydrogen can enter metallic microstructures from deposition processes like Cr plating or phosphatizing, chemical and electrochemical pickling treatments, during welding operations if the humidity of consumables is too high, by cathodic processes resulting from corrosion phenomena or contact with high pressure gaseous hydrogen. According to different chemical-physical mechanisms, atomic hydrogen can enter the metallic structure resulting in damages of various forms, such as HIC (hydrogen induced cracking), SOHIC (stress oriented HIC), delayed fracture and hydrogen embrittlement (HE).
Picture for Effect of surface contamination on the corrosion performance of thermally sprayed aluminium coating in synthetic seawater
Available for download

Effect of surface contamination on the corrosion performance of thermally sprayed aluminium coating in synthetic seawater

Product Number: 51323-19138-SG
Author: Adriana Castro-Vargas, Shiladitya Paul
Publication Date: 2023
$20.00

Coating standards specify the required surface conditions needed prior to coating. A maximum amount of soluble salts of 20 mg/m2 is widely adopted as acceptation criteria, according to standard NORSOK M-5011. However, meeting these requirements for thermal spray aluminium coatings (TSA) in offshore environments is challenging due to the ubiquitous nature of water-soluble salts.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support