Abstract

Boiler generates heat from combustion and transfers to change the water to steam phase. The boiler consists of several components, one of them is superheater tube. High temperature corrosion often attacks the superheater tube material causes material failure. This study aims to deposit Ni-Al and Ni-20Cr on AISI 4140 using twin wire arc spray method as barrier coating. Gas pressure during process was varied of 3 bar, 4 bar, 5 bar, and 6 bar followed by annealing to reduce porosity of the coating product. Characterization to investigate the morphology of the coating surface using SEM shows that the increase pressure causes small surface particles that affects to decrease porosity. Porosity at pressure 3 bar is 15.43% while at pressure 6 bar is 10,35%. In addition, the annealing process has contribution to reduce the porosity till 3% for pressure 6 bar. The hardness of the coating is also influenced by the pressure and the annealing process.

Original languageEnglish
Title of host publication1st International Seminar on Advances in Metallurgy and Materials, i-SENAMM 2019
EditorsDaisman Purnomo Bayyu Aji, Triyono Triyono, Fethma M. Nor
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420229
DOIs
Publication statusPublished - 17 Sept 2020
Event1st International Seminar on Advances in Metallurgy and Materials, i-SENAMM 2019 - Jakarta, Indonesia
Duration: 12 Dec 201913 Dec 2019

Publication series

NameAIP Conference Proceedings
Volume2262
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference1st International Seminar on Advances in Metallurgy and Materials, i-SENAMM 2019
Country/TerritoryIndonesia
CityJakarta
Period12/12/1913/12/19

Keywords

  • Annealing
  • Morphology
  • Porosity
  • Twin wire arc spray

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