Formulation of Anti-Corrosive Alkyd Paints Based on Umuahia Clay Extender

International Journal of Polymer and Textile Engineering

© 2020 by SSRG - IJPTE Journal

Volume 7 Issue 2

Year of Publication : 2020

Authors : Isaac O. Igwe, Florence N. Acha, Christian O. Anyaegbu, Glory I. Agwu, Victor C. Ifeacho, Wisdom C. Esinwoke, Gospel S. Asiegbu and Chinedu Nwapa.

10.14445/23942592/IJPTE-V7I2P105

How to Cite?

Isaac O. Igwe, Florence N. Acha, Christian O. Anyaegbu, Glory I. Agwu, Victor C. Ifeacho, Wisdom C. Esinwoke, Gospel S. Asiegbu and Chinedu Nwapa., "Formulation of Anti-Corrosive Alkyd Paints Based on Umuahia Clay Extender," SSRG International Journal of Polymer and Textile Engineering, vol. 7,  no. 2, pp. 25-30, 2020. Crossref, https://doi.org/10.14445/23942592/IJPTE-V7I2P105

Abstract:

Umuahia clay was used as an extender to formulate alkyd paints possessing anti-corrosive property on mild steel. The clay which was sieved to 0.075 mm particle size was used within extender contents, 0 to 80.0 wt.%. Titanium dioxide prepared alkyd paint served as the reference paint while xylene was used as the solvent. Determinations on the properties of clay gave the following results: pH (6.50), specific gravity (2.10), oil absorption (36.0 g/100 g), and refractive index (1.63). The clay was stable to heat and the chemical media studied, and composed largely of silica (60.90 wt.%), alumina (24.63 wt.%) and titanium dioxide (3.50 wt.%). Other metallic oxides are present in negligible amounts. The formulated paints exhibited satisfactory surface -, and throughdry times, and the paint sample containing 80 wt.% clay had the best through-dry time of 216 min. The film thickness of the paint dry films were within 0.10 to 0.15 mm, an indication that the films will form barriers resistant to weathering. The formulated paint samples had good impact strength and the dry paint film hardness was observed to increase with increasing clay content. The paint samples containing 60, and 80.0 wt.% clay had maximum pencil hardness of 5H. The adhesion of the paint dry films to mild steel surfaces was generally good, and adhesion losses were in the range, 3.0 to 25.0 %. The paint dry films exhibited no blistering or severe paint defects on immersion in 3% NaCl except for slight colour changes which are suggestive of anti-corrosive property of the paints. The performance of the dry paint films in deionized water, and 3% Na2CO3, was generally satisfactory unlike the performance in 3% H2SO4 where some paint defects occurred. The present study has highlighted the utility of Umuahia clay in formulating paints for the protection of mild steel in salty environments, the property which is attributed to the presence of inert oxides of silica, alumina, and titanium dioxide in the clay.

Keywords:

Alkyd Paints, Umuahia Clay, Extender, Titanium Dioxide, Particle Size.

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