- Tue Mar 21, 2017 12:15 am
Red is correct: most formulations of Simple Green are not compatible with aluminum. Why? Because they contain some percentage (yes it is small but powerful) of Potassium Hydroxide or, in the case of the carpet cleaner, Sodium Hydroxide. These are caustic chemicals that attack and etch the surface of the aluminum...... 'can even remove the anodizing, attack the base metal, and create a clear path for corrosion to take hold. The ingredients can be found by doing a search for "Simple Green MSDS". Caustic chemicals are found in many cleaners and aluminum does not like caustics..... ( but they are useful in cleaners...... for instance they increase PH which in turn creates an environment that most bacteria abhor.....)
As a note, we use sodium hydroxide to etch metallurgical samples of aluminum alloy so that particular grain structures are revealed........ we can then look at welds, stress, corrosion, coating thickness, and other things of interest when doing failure analysis. It attacks aluminum...... and in metallurgical investigations it is useful. But I would never put it on aluminum that will be placed into service.
I would highly recommend looking at MSDS data for any product that you think of using to clean/lube/....../etc your wing. Then research the compatibility of the component chemicals with the materials that it will contact. Again a search of "chemical such and such compatibility with whatever material" ........ potassium hydroxide is listed as having a severe attack on aluminum in several citations.
The advise on using very mild soaps and things that will not attack the materials in our wings is good...... as is the advise to rinse thoroughly........ residue needs to be removed.
That's my two cents.