# can sodium persulfate etch or damage a titanium heater?

I use Sodium Persulfate to etch copper on a PCB process. I have been using glass heater on the etching tank but the glass is too fragile; it breaks too easily.

I read that titanium heater is used commercially (in aquariums as well). I don't know much about chemistry, could anyone tell me if it is okay to use titanium with Sodium Persulfate?

Sodium Persulfate to water ratio is 1:10 and the maximum temperature is about 50 C.

• what do you mean by 5dm2? Five liters of water (liter = dm$^3$)? Jul 27 '14 at 20:50
• I copied pasted from the description on elfa.se/elfa3~se_en/elfa/… I keep acid/water ratio 1:10
– sven
Jul 27 '14 at 21:12
• So what it says there is that 140g of powder is enough to etch 6 dm$^2$ (about 100 square inches). So 6dm2 is not part of the formula; can you edit your question accordingly? Jul 27 '14 at 21:45

If the surface of the immersed element is all titanium, the answer appears to be that it won't get corroded unless the temperature is much higher than 50$^\circ$C; see http://www.azom.com/article.aspx?ArticleID=1336