The Effectiveness of using Diffusion Coating on Steel Alloys (Steel-H25) to Resist Hot Corrosion Resulting from Sodium Chloride (NaCl) and Sodium Sulfate (Na2SO4)

Select Volume / Issue:

• Volume 12, Issue 4, July 2024

Year:

2024

Type of Publication:

Article

Keywords:

Diffusion Coating, High-Temperature Oxidation, Hot Corrosion, Parabolic Relationship

Authors:

Mohammed I. Yousef; Mahmood A. Hamood

Journal:

IJISM

Volume:

12

Number:

4

Pages:

12-21

Month:

July

ISSN:

2347-9051

Abstract:

This research aims to modify the surface components of Steel-H25 alloy using a surface engineering method through diffusion coating technology to obtain new alloys with high efficiency in resisting harsh environmental conditions. In this research, a harsh test was used for these produced alloys, which is the oxidation process at high temperatures and in a vapor atmosphere of a mixture of sodium chloride (NaCl) and sodium sulfate (Na2SO4) at a temperature of 900 degrees Celsius, then comparing it with the base alloy. The results showed in general that the alloys produced in this way are very efficient. While the results also showed that the single aluminum coating is highly efficient in resisting oxidation and hot corrosion testing and has provided better protection for a longer period compared to the uncoated alloy. This is due to its high adhesion to the formed Al2O3 oxide skin layer as well as to the formed phases rich in aluminum, whether these phases are nickel-aluminum or iron-aluminum phases. The results also showed that the thickness of the coating and the weight gained by the alloy are subject to a parabolic relationship with time.

Full text: IJISM_1007_FINAL.pdf [Bibtex]