To minimize creating preservation folk-lore by repetition and/or anecdotal testimonials, there have been attempts to review various consumer products to find the most effective. Here's one:
Comprehensive Corrosion Test: 46 Products Compared | Day At The Range
However, their tested-best product was only declared winner after 168 hours. That's only a week of corrosive test days. Thus, it's up to you how you want to address maintenance; by re-application or a back-to-basic refinishing regiment to restore it to a particular "look". The above test included a corrosion test on a static, non-moving piece of metal.
Airplane props blow air. They typically rotate at 2500-3000 rpm, but can be subject to more corrosive ambient conditions than an engine fan blade. Barrier coatings, thermal or cold sprays should last longer in a prop's harsher environment. An answer might be in this Google search: "What protective coating on airplane propellers?"
https://www.google.com/search?client=firefox-b-1-ab&sxsrf=ACYBGNTQi-jfLqlTVUabLmVQcsU35M556w%3A1577485180116&ei=fIMGXobTBof1-gSRvpugBA&q=Typical+airplane+propeller+speed%3F&oq=Typical+airplane+propeller+speed%3F&gs_l=psy-ab.3..0i22i30.1483.11821..12229...2.2..0.139.3411. 30j9......0....1..gws-wiz.....10..0i71j35i39j0i20i263j0j0i131j0i67j35i36 2i39j0i22i10i30j33i160.B4KeYHHHhaM&ved=0ahUKEwiGgbKe7tbmAhWHup4KHRHfBkQQ4dUDCAo&uact=5
Sherwood