SOLUTION ETCHANT #074
ALSO, KNOWN AS NITAL 10% ETHANOL
MADE WITH ETHANOL
Etchant Solution following the standards of ASTM E-407. With the solution, a COA is provided and the COA's of all the chemicals used to make the solution.
ALL SOLUTIONS ARE MADE THE SAME DAY OF SHIPPING
10 mL HNO3
100 mL Ethanol (95 %)
Etching rate is increased, sensitivity decreased with increased percentage of HNO3.
(a) Immerse few seconds to a minute.
(b) Immerse 5–40 s in 5 % HNO3 solution.
To remove stain, immerse 25 s in 10 % HCl-methanol solution.
(c) For Inconels and Nimonics, use 5 mL HNO3 solution—electrolytic at 5–10 V for 5–20 s.
(d) Swab or immerse several minutes.
(e) Swab 5–60 s.
HNO3 may be increased to 30 mL in methanol only depending on alloy.
(Ethanol is unstable with over 5 % HNO3.
) Do not store.
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