Menu
Search
Filters
Close
Menu

Celebrate World Corrosion Awareness Day with 20% off eCourses and eBooks with code WCAD2024 at checkout!

51316-7319-Effect of Elements Mo and W on Humidity Corrosion of Low Alloy Steels in H2S-Containing Environment

Picture for Effect of Elements Mo and W on Humidity Corrosion of Low Alloy Steels in H2S-Containing Environment
Available for download

The effect of Tungsten (W) and Molybdenum (Mo) on the corrosion behavior of low alloy steels exposed to acid humidity corrosion environment containing O2, H2S, and CO2 was investigated using weight loss, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements.

Product Number: 51316-7319-SG
ISBN: 7319 2016 CP
Author: Wei Liu
Publication Date: 2016
Industries: Materials Selection and Design , Science of Corrosion
$0.00
$20.00
$20.00

The effect of Tungsten (W) and Molybdenum (Mo) on the corrosion behavior of low alloy steels exposed to acid humidity corrosion environment containing O2, H2S, and CO2 was investigated using weight loss, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The results indicate that both addition of W and Mo can improve corrosion resistance of low alloy steels, and the enhancement effect of W is better than Mo. Surface layers are mainly composed of FeOOH, Fe3O4, and small amount of S and Fe2 (SO4)3·nH2O. Mo and W element in steels can be oxidized into MoO2, MoO3, and WO3, respectively, which can act as corrosion inhibitor during corrosion process. Mo steel have lower corrosion resistance than W steel, because the chemical transformation from MoO2 to MoO3 may form defects inside surface layers, and the smaller molecular mass and volume of MoO3 than WO3 makes MoO3 easier to move in surface layers and lower the resistance of anodic dissolution.

Key words: Downloadable, W, Mo, O2-H2S-CO2, humidity corrosion

The effect of Tungsten (W) and Molybdenum (Mo) on the corrosion behavior of low alloy steels exposed to acid humidity corrosion environment containing O2, H2S, and CO2 was investigated using weight loss, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical measurements. The results indicate that both addition of W and Mo can improve corrosion resistance of low alloy steels, and the enhancement effect of W is better than Mo. Surface layers are mainly composed of FeOOH, Fe3O4, and small amount of S and Fe2 (SO4)3·nH2O. Mo and W element in steels can be oxidized into MoO2, MoO3, and WO3, respectively, which can act as corrosion inhibitor during corrosion process. Mo steel have lower corrosion resistance than W steel, because the chemical transformation from MoO2 to MoO3 may form defects inside surface layers, and the smaller molecular mass and volume of MoO3 than WO3 makes MoO3 easier to move in surface layers and lower the resistance of anodic dissolution.

Key words: Downloadable, W, Mo, O2-H2S-CO2, humidity corrosion

Product tags
Also Purchased
Picture for Investigation of the Stress Corrosion Cracking Behavior of Duplex and Lean Duplex Stainless Steel Pa
Available for download

51316-7325-Investigation of the Stress Corrosion Cracking Behavior of Duplex and Lean Duplex Stainless Steel Parent and Weldment Materials in Sour Service

Product Number: 51316-7325-SG
ISBN: 7325 2016 CP
Author: Chong Li
Publication Date: 2016
$20.00

Lean duplex stainless steel (LDSS) can provide mechanical properties similar to that of duplex stainless steel (DSS) and is less expensive. The focus of this work was to assess the stress corrosion cracking (SCC) and SCC susceptibility of DSS and LDSS in chloride-containing sour water conditions.

 
Picture for Effect of Iron Sulfide Deposits on Sour Corrosion of Carbon Steel
Available for download

51316-7313-Effect of Iron Sulfide Deposits on Sour Corrosion of Carbon Steel

Product Number: 51316-7313-SG
ISBN: 7313 2016 CP
Author: Jon Kvarekval
Publication Date: 2016
$20.00

The corrosive effects of iron monosulfide deposited on carbon steel surfaces were investigated in  autoclave experiments. The H2S and CO2 partial pressures were 1 to 20 bar.  Temperatures were 10-120 °C. The test solutions consisted of high-salinity brine and low-salinity condensed water. Typical duration was 14 days. Weight loss and localized corrosion data were obtained.
Picture for Impact of Biocomponents in the Fuel and Heating Oil on the Compatibility of Sealing Materials
Available for download

51316-7307-Impact of Biocomponents in the Fuel and Heating Oil on the Compatibility of Sealing Materials

Product Number: 51316-7307-SG
ISBN: 7307 2016 CP
Author: Margit Weltschev
Publication Date: 2016
$20.00

The objective of this research was to determine the resistance of frequently used sealing materials in fuels and heating oil with and without admixtures such as E10, diesel fuel with 5 % biodiesel, non-aged and 2 year aged B10 (heating oil with 10 % biodiesel), pure diesel, standard heating oil and premium grade fuel Super plus at 20 °C, 40 °C and 70 °C.
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