Open AccessThe effect of chloride ion diffusion on corrosion activity of kaolin geopolymer paste in artificial seawater
Author(s) -
Farah Farhana Zainal,
Sahrul Abd Hakim,
Yusrina Mat Daud,
Mohammad Firdaus Abu Hashim,
Mohd Mustafa Al Bakri Abdullah,
Hasri,
. Hartati
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/701/1/012002
Subject(s) - geopolymer , sodium silicate , aluminosilicate , chloride , materials science , corrosion , sodium hydroxide , sodium , seawater , hydroxide , metallurgy , chemical engineering , chemistry , inorganic chemistry , composite material , fly ash , geology , biochemistry , catalysis , oceanography , engineering
This paper presents the effect of chloride ion diffusion on the corrosion activity of kaolin geopolymer paste in artificial seawater. An aluminosilicate material that rich with aluminium and silicon such as kaolin is selected as a raw material in the geopolymerization of geopolymer. Kaolin then mixed with an alkaline activator that consist mixture of sodium hydroxide (NaOH) solution with sodium silicate (Na 2 SiO 3 ) solution. Two types of samples are used in this study, which 7 days and 14 days sample. A few testing is conducted in order to test the chloride ion diffusion on the samples such as Rapid Chloride Permeability Test, Rapid Migration Test and Salinity Test. The result shows that sample for 7 days consist the higher penetration of chloride ion compare sample of 14 days. This is proven with the result of salinity. A longer curing time of the sample cause a lesser penetration of Cl − ion.