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The chromate coating acts as paint does, protecting the zinc from white corrosion, thus making the part considerably more durable, depending on the chromate layer's thickness. [ 8 ] [ 9 ] [ 10 ] The protective effect of chromate coatings on zinc is indicated by color, progressing from clear/blue to yellow, gold, olive drab and black.
WD-40's formula is a trade secret. [17] The original copy of the formula was moved to a secure bank vault in San Diego in 2018. [18] To avoid disclosing its composition, the product was not patented in 1953, and the window of opportunity for patenting it has long since closed.
Application of gentle heat sufficient to melt the waxy hydrocarbons allows cosmoline to drip off. Penetrating oil (such as WD-40 or CRC 5-56 CLP) sprayed and allowed to soak in until cosmoline is restored to a viscous-fluid state allows it to be wiped off. A closed-cabinet parts washer may be used to power wash smaller items. An aqueous rather ...
WD-40 is known for its thousands of uses, but there are a few times that you should avoid using the product. The post 5 Times You Should Never Use WD-40 appeared first on Reader's Digest.
-- A mechanism gummed with old WD40 can be cleaned by spraying with fresh WD-40, allowing the solvent to soften the gum, then spraying the mechanism clear with compressed air or aerosol brake cleaner (outdoors only please). -- I have cleaned rusty parts by soaking in WD-40 (the parts not me) for 48 hours then shaving the rust off with a razor ...
Aluminium alloy parts are anodized to greatly increase the thickness of this layer for corrosion resistance. The corrosion resistance of aluminium alloys is significantly decreased by certain alloying elements or impurities: copper , iron , and silicon , [ 5 ] so 2000-, 4000-, 6000 and 7000-series Al alloys tend to be most susceptible.
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