Where was The Parker Process....

[BobPalma]

...when Studebaker-Packard could have really used it?

From the new Packard Automobile Classics Club Second Quarter 2015 Quarterly, The Packard Cormorant:



This was obviously World War One fare; does anybody know anything about it? BP

[55 56 PREZ 4D]

Google "parkerizing".
Parts are submerged in a phosphoric acid solution then heated.

[Guido]

Parkerizing is a familiar term to those acquainted with guns.

[BobPalma]

Ah, yes; Parkerizing. 'Should have recognized that natural derivation from The Parker Process.
I wonder when they changed it from The Parker Process, as in that advertisement, to Parkerizing. Parkerizing makes a lot more sense from a promotional standpiont. BP

[64Avanti]

This also produces a good surface for painting.

[GinettaG12P]

Hmmm...I seem to recall that reground cams were sometimes Parkerized to aid in oil retention during break-in.

[jnormanh]

"Parker Process", "Parkerizing" are trade names for phosphate coatings. Under paint it's usually zinc phosphate, as applied, ie, dried. For wear or break-in lubrication it's usually manganese phosphate, oiled.

Rarely it's iron phosphate where especially thin coatings are required.

It provides an excellent semi-porous surface for holding paint or oils, so yes, it does improve corrosion resistance by providing excellent retention of paint or oil.

[raprice]

My first reaction was that it was similar to Ziebart, but after reading the above descriptions, I stand corrected.
Rog

[bhapner]

Gosh, It always amazes me the things I learn just browsing the forum.

bhapner

[Son O Lark]

I'm pretty sure Lark Parker invented it.