Identification of corrosion product on medium carbon steel under the exposure of Banda Aceh's atmosphere

7th AIC‐ICMR on Sciences and Engineering 2017

自然科学;工业技术

Thalib, Sulaiman^1 ; Ikhsan, Muharil^1 ; Fonna, Syarizal^1 ; Huzni, Syifaul^1 ; Ridha, Syahrir^2

Department of Mechanical and Industrial Engineering, Faculty of Engineering, Syiah Kuala University, Jl. Tgk. Syech Abdur Rauf No. 7, Darussalam-Banda Aceh

23111, Indonesia^1

Petroleum Engineering Department, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, Perak Darul Ridzuan

32610, Malaysia^2

关键词: Corrosion products;    Engineering faculty;    Lepidocrocite;    Measurements of;    Medium-carbon steels;    SEM analysis;    Weight loss;    XRD analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/352/1/012004/pdf
DOI  :  10.1088/1757-899X/352/1/012004

来源: IOP

【 摘 要 】

This research was conducted to study the form of corrosion products of medium carbon steel under the exposure of Banda Aceh's atmosphere. The medium carbon steel samples which the size based on ASTM G 50 were exposed in open areas around the Engineering Faculty, Syiah Kuala University, Darussalam - Banda Aceh, Aceh province, Indonesia. The study was carried out from January through December 2016. The corrosion product formed on the surface of the samples was studied using X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) method. Measurements of weight loss due to atmospheric corrosion as a basis for calculating corrosion rates was referring to ASTM G1. Corrosion product found based on XRD analysis was lepidocrocite (FeO2, γ-FeOOH) and goethite (FeO2, α-FeOOH). The results agreed with SEM analysis that also indicates to lepidocrocite and goethite. The corrosion rate for twelve months showed that the highest rate occurs in the period of March-April that was 0.024 mpy. During twelve months exposure, the corrosion products consist of lepidocrocite and goethite. Significant changes began to occur in the eighth month, where the product of corrosion was almost entirely goethite.