Clean up Nikasil bore?

[AllanB]

I though that coating was a zilionth of a thou or something so about the same thickness as a fleas dick?

[pete376403]

using the old sort of green solder flux works on iron bores not sure re Plated ones.
I can even find what it was called it was a green squezy one with ribs on the side.

Duzall 10chars

[husaberg]

Duzall 10chars

looks right but ingredients
Zinc chloride?and 5%hcl it would try it with some cast and some auminium to check first.

As a metallurgical flux
Zinc chloride has the ability to react with metal oxides (MO) to give derivatives of the formula MZnOCl2.[33][additional citation(s) needed] This reaction is relevant to the utility of ZnCl2 solution as a flux for soldering — it dissolves oxide coatings, exposing the clean metal surface.[33] Fluxes with ZnCl2 as an active ingredient are sometimes called "tinner's fluid". Typically this flux was prepared by dissolving zinc foil in dilute hydrochloric acid until the liquid ceased to evolve hydrogen; for this reason, such flux was once known as "killed spirits". Because of its corrosive nature, this flux is not suitable for situations where any residue cannot be cleaned away, such as electronic work. This property also leads to its use in the manufacture of magnesia cements for dental fillings and certain mouthwashes as an active ingredient.

wasnt there a similar one in the blue bottle as well?


According to this its muriatic acid that does the business.
https://www.snowmobilefanatics.com/f...cyl-walls.html
http://modernvespa.com/forum/topic149547
the green bottle flux used to be made with it, not sure if it still iis though.
I never knew this

Muriatic acid is one of the names for hydrochloric acid.

[rok-the-boat]

Take the barrel and new piston to an engine reconditioner. I was quoted $60 to hone mine.

[nzspokes]

Take the barrel and new piston to an engine reconditioner. I was quoted $60 to hone mine.

I used WD40 and scotchbrite. Its now going through a hard break in.

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