Nace Rp 0391 Pdf

: Sulfuric acid is hygroscopic (it absorbs moisture from the air). Even small amounts of water dilution can make the acid significantly more corrosive to carbon steel.

: Sulfuric acid is "thirsty"—it pulls moisture from the air. If the acid becomes diluted by atmospheric humidity, it loses its ability to form that protective iron sulfate layer and becomes much more aggressive toward the steel. ANSI Webstore The Engineer's Toolkit nace rp 0391 pdf

: Focuses on alloys and construction materials (like carbon steel) suitable for storage tanks and piping systems in the chemical process industry (CPI). Limitations : Sulfuric acid is hygroscopic (it absorbs moisture