Are plastic tanks more chemical-resistant than stainless or alloy steel tanks?
A. Plastic tanks, specifically polypropylene plastic tanks, are compatible with alkaline solutions, mineral oils, amines, jet fuel (JP3, 4, 5), and hydrogen peroxide, plus common acids including hydrochloric (20%), maleic, nitric (50%) and phosphoric. There are instances where plastic tanks are not appropriate, including concentrated acids, benzene and toluene. For concentrated acids, Hastalloy is preferred. For benzene and toluene, PVDF, a special plastic tanks resin, is often specified. PVDF plastic tanks are exceptionally resistant to inorganic acid solutions.
