Assessing the Chemical Durability of Textured Glass-Coat for Building Application

Abstract

The need to assess the chemical properties of coats produced for building applications is of essence, especially in an acidic or alkaline  environment. To determine this property, this study investigates the reactions of textured Glass-coat to chemicals. Samples of textured  glass-coat developed from Post Consumer Glass (PCG) were subjected to Adhesion test (ASTM D3359), pH test (ASTM D5464), Chemical  resistance test (ASTM D3260 and D1308), and Abrasion test (ASTM D4060). Results show an adhesion of 4A and a pH of 8.50 respectively.  The chemical resistance result shows the following: A 5% flick rate was observed when reacted with Sodium hydroxide (NaOH) solution;  decolouration with the following solutions was observed: Magnesium hydroxide (Mg(OH)2) 3% decolouration, Hydrogen Fluoride (HF) 5%  decolouration , Potassium hydroxide (KOH) 7% decolouration and NaOH10% decolouration was observed. Also, the analysis show  that the coat exhibits 0.2g abrasion rate. The results from the analysis confirm that the developed textured glass-coat is in line with the  pH standard which ranged from 8–9 (ASTM D5464), significant resistant to acid and base solutions were observed except for HF, NaOH,  KOH and Mg(OH)2 where a negligible flick rate and colouration defects was observed. Also, based on the result, an excellent adhesion  and abrasion properties was established. Finding shows that the developed Glass-coat exhibits excellent resistant to chemical  degradation especially in an acidic situation and it is recommended as a suitable engineering material for building applications.