Effect of austempering temperature and time on corrosion behaviour of ductile iron in chloride and acidic media

A. S. Afolabi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Purpose: The aim of this paper is to study the effect of heat treatment temperature and time on the corrosion behavior of ductile iron in 0.5 M NaCl and 0.5 M H<DN>2</DN>SO<DN>4</DN>. Design/methodology/approach: Ductile iron samples of known composition were austenized at temperatures 800°C and 850°C, and austempered at 300°C and 350°C for periods of 30, 45 and 60 min to convert them to austempered ductile iron (ADI). The corrosion behavior of these ADI samples in 0.5 M NaCl and H<DN>2</DN>SO<DN>4</DN> was measured using the conventional weight loss method. The metallographic examination of the samples was carried out to study the morphology of their corroded surfaces. Findings: Ductile iron is susceptible to corrosion in both acidic and chloride media, while attack by acid media is mainly at the grain boundaries, that from the chloride is pitting. The corrosion behavior of the material is affected by the compositional structures of the materials as well as the austempering temperature and time it was subjected to. Practical implications: Ductile iron has the potential to replace costlier materials in many engineering and structural applications. Originality/value: The results revealed that the corrosion of ADI in both acidic and chloride media were strongly dependent on the structure of the material, which in turn was affected by the austempering temperature and time.

Original languageEnglish
Pages (from-to)190-195
Number of pages6
JournalAnti-Corrosion Methods and Materials
Volume58
Issue number4
DOIs
Publication statusPublished - Jun 2011

Fingerprint

Nodular iron
Chlorides
Corrosion
Temperature
Pitting
Grain boundaries
Heat treatment
Acids
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

@article{461eb3d7d62b438aa58f6438ebe259a1,
title = "Effect of austempering temperature and time on corrosion behaviour of ductile iron in chloride and acidic media",
abstract = "Purpose: The aim of this paper is to study the effect of heat treatment temperature and time on the corrosion behavior of ductile iron in 0.5 M NaCl and 0.5 M H<DN>2SO<DN>4. Design/methodology/approach: Ductile iron samples of known composition were austenized at temperatures 800°C and 850°C, and austempered at 300°C and 350°C for periods of 30, 45 and 60 min to convert them to austempered ductile iron (ADI). The corrosion behavior of these ADI samples in 0.5 M NaCl and H<DN>2SO<DN>4 was measured using the conventional weight loss method. The metallographic examination of the samples was carried out to study the morphology of their corroded surfaces. Findings: Ductile iron is susceptible to corrosion in both acidic and chloride media, while attack by acid media is mainly at the grain boundaries, that from the chloride is pitting. The corrosion behavior of the material is affected by the compositional structures of the materials as well as the austempering temperature and time it was subjected to. Practical implications: Ductile iron has the potential to replace costlier materials in many engineering and structural applications. Originality/value: The results revealed that the corrosion of ADI in both acidic and chloride media were strongly dependent on the structure of the material, which in turn was affected by the austempering temperature and time.",
author = "Afolabi, {A. S.}",
year = "2011",
month = "6",
doi = "10.1108/00035591111148902",
language = "English",
volume = "58",
pages = "190--195",
journal = "Anti-Corrosion Methods and Materials",
issn = "0003-5599",
publisher = "Emerald Group Publishing Ltd.",
number = "4",

}

Effect of austempering temperature and time on corrosion behaviour of ductile iron in chloride and acidic media. / Afolabi, A. S.

In: Anti-Corrosion Methods and Materials, Vol. 58, No. 4, 06.2011, p. 190-195.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of austempering temperature and time on corrosion behaviour of ductile iron in chloride and acidic media

AU - Afolabi, A. S.

PY - 2011/6

Y1 - 2011/6

N2 - Purpose: The aim of this paper is to study the effect of heat treatment temperature and time on the corrosion behavior of ductile iron in 0.5 M NaCl and 0.5 M H<DN>2SO<DN>4. Design/methodology/approach: Ductile iron samples of known composition were austenized at temperatures 800°C and 850°C, and austempered at 300°C and 350°C for periods of 30, 45 and 60 min to convert them to austempered ductile iron (ADI). The corrosion behavior of these ADI samples in 0.5 M NaCl and H<DN>2SO<DN>4 was measured using the conventional weight loss method. The metallographic examination of the samples was carried out to study the morphology of their corroded surfaces. Findings: Ductile iron is susceptible to corrosion in both acidic and chloride media, while attack by acid media is mainly at the grain boundaries, that from the chloride is pitting. The corrosion behavior of the material is affected by the compositional structures of the materials as well as the austempering temperature and time it was subjected to. Practical implications: Ductile iron has the potential to replace costlier materials in many engineering and structural applications. Originality/value: The results revealed that the corrosion of ADI in both acidic and chloride media were strongly dependent on the structure of the material, which in turn was affected by the austempering temperature and time.

AB - Purpose: The aim of this paper is to study the effect of heat treatment temperature and time on the corrosion behavior of ductile iron in 0.5 M NaCl and 0.5 M H<DN>2SO<DN>4. Design/methodology/approach: Ductile iron samples of known composition were austenized at temperatures 800°C and 850°C, and austempered at 300°C and 350°C for periods of 30, 45 and 60 min to convert them to austempered ductile iron (ADI). The corrosion behavior of these ADI samples in 0.5 M NaCl and H<DN>2SO<DN>4 was measured using the conventional weight loss method. The metallographic examination of the samples was carried out to study the morphology of their corroded surfaces. Findings: Ductile iron is susceptible to corrosion in both acidic and chloride media, while attack by acid media is mainly at the grain boundaries, that from the chloride is pitting. The corrosion behavior of the material is affected by the compositional structures of the materials as well as the austempering temperature and time it was subjected to. Practical implications: Ductile iron has the potential to replace costlier materials in many engineering and structural applications. Originality/value: The results revealed that the corrosion of ADI in both acidic and chloride media were strongly dependent on the structure of the material, which in turn was affected by the austempering temperature and time.

UR - http://www.scopus.com/inward/record.url?scp=79960056638&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79960056638&partnerID=8YFLogxK

U2 - 10.1108/00035591111148902

DO - 10.1108/00035591111148902

M3 - Article

AN - SCOPUS:79960056638

VL - 58

SP - 190

EP - 195

JO - Anti-Corrosion Methods and Materials

JF - Anti-Corrosion Methods and Materials

SN - 0003-5599

IS - 4

ER -