Aerospace

Q: Is there any damage that could be caused to our parts if they were washed in the Liquinox Solution after being expired for 5 days? Would reprocessing the products in Non Expired Solution be a safe resolution? A: As discussed here, Using Expired Detergent, the cleaning in expired Liquinox detergent….

Q: We typically clean our carbon steel with Citrajet detergent but following an unintentional overnight soak, we found a dark layer of black soot.  What might this be and how should we clean it?

A: All steels that aren’t stainless will eventually get attacked by acidic solutions over time, so what you are seeing there is the action of the acids in both Citrajet® Low-Foam Liquid Acid Cleaner/Rinse (and would be the same case with its foaming sibling Citranox® Liquid Acid Cleaner and Detergent) on the carbon steel that you are using…..

Need a wetting agent for aircraft approval, PMC 1610? More on Pratt & Whitney specification for Alconox used in fuel injector cleaning in jet engines.

Q: I’m looking for detergents similar to Liquinox and Citranox, that are specially formulated for cold water cleaning conditions. Can you recommend analogs to the two?

A: For most residues, the detergency of an aqueous detergent is enhanced and hastened by heat. 

Q:  What is the difference between Liquinox vs. Citranox?  We are using Liquinox for many of our applications but are having trouble with stainless steel cleaning cannulas with a small ID.  Is Citranox the answer if the residue is inorganic?

A: Although Liquinox detergent is excellent at cleaning a host of residues, Citranox cleaner is indeed the better choice if we are fairly certain this is a largely inorganic residue.