Corrosivity of fluoride ions on titanium materials
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In a saturated solution of sulfuric acid with 500 ppm fluoride ions, at a temperature of 95–100°C, are Ti2 (titanium 2) tubes resistant to corrosion? Could you recommend corrosion-resistant materials? Thank you.
In an acidic environment with fluoride ions present, when their concentration exceeds 30PPM, the oxide film on the titanium surface can be damaged. Here is an article that might be useful for reference: The corrosive effect of fluorides on pure titanium and titanium alloys http://www.doc88.com/p-5773059279240.html
Graphite heat exchangers are recommended under these operating conditions. Graphite heat exchangers can be used for a long time without corrosion at 47% hydrofluoric acid boiling point conditions ； Graphite materials can be used to manufacture heaters, condensers, coolers, falling film absorbers, towers, and various custom-made equipment.