Osmosis can be linked to various factors, mainly the quality of manufacture of the pool shell (thickness and quality of the gelcoat, quality of the polyester resin of the laminate, working conditions in the workshop, drying, etc.), but also an expiry date not respected or poor storage conditions.
The analyzes recommended by Polymex for this type of defect on a pool are among others:
• Control of the thickness of the gelcoat by MEB / EDX;
• Control of the nature of the polyester resin used (Ortho, Iso, IsoNPG, Vinyl…) by Pyrolysis / GCMS.
• Verification of the presence of Formate / Acetate resulting from the hydrolysis of the polyester by ion chromatography (IC).
• Determination of the fiberglass and polyester resin content in the laminate by calcination in a muffle furnace at 750 ° C in air and gravimetry.