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Thread: Hi tek flaking off

  1. #1
    Boolit Bub
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    Hi tek flaking off

    Has anyone else noticed hi tek flaking off after sitting on the shelf for an extended time? When I first coated them, they passed the smash test and the wipe test. I loaded a bunch and they shot great. I stored them in a plastic container. Jumping foward about a year. I went to load the remaining boolits and found that the coating was coming off. Im glad I didnt coat thousands just a few hundred. Do you suppose I did something wrong? Oh well back into the smelting pot.

  2. #2
    Super Moderator


    HATCH's Avatar
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    could be oxidation under the coating causing it to flake off?
    Don't like being hammered by the Cast Boolits Staff, then don't be a nail.
    The rules are simple to follow.

  3. #3
    Boolit Master
    Ausglock's Avatar
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    Yep. normally the case is oxidisation on the lead due to contaminates.
    I have commercially coated bullets here that are around 10 years old.
    Hooroo.
    Regards, Trevor.
    Australia

  4. #4
    Boolit Master Grmps's Avatar
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    You didn't happen to quench the boolits after you cast them? that's an easy way to contaminate the surface.
    The cleaner the lead (alloy) the less chance of this happening.

  5. #5
    Boolit Bub
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    Thanks for the heads up. I usually store them in a tupperware container (air tight?). But maybe this bunch got contaminated somehow.

  6. #6
    Boolit Master fredj338's Avatar
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    I haven't that many sitting around but I agree, probably something contaminating the bullet surface prior to coating. Do you size prior? If so do you use size anything else in the sizer?
    EVERY GOOD SHOOTER NEEDS TO BE A HANDLOADER.
    NRA Cert. Inst. Met. Reloading & Basic Pistol

  7. #7
    Boolit Bub
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    I only size after coating and usually coat shortly after casting.

  8. #8
    Boolit Mold
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    I’ve seen similar issues. Is PC as sensitive too surface contamination?.

  9. #9
    Boolit Master

    HI-TEK's Avatar
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    Quote Originally Posted by HATCH View Post
    could be oxidation under the coating causing it to flake off?
    Hatch,
    I think you are right on with Oxidation.
    I have seen Lead that was contaminated with Zinc, Magnesium, and Cadmium, and they all develop a metal oxide of sort, (powdery white crust) on alloy surface, that develops with time and moisture/humidity.
    Any coating, will "breathe" and these active metals will cause problems with adhesion with coatings in time.
    I have suggested, that cast alloy that may have such metal contaminations can be soaked in Muriatic Acid diluted with water about 1 part acid to 2 parts Water, and these active metals will dissolve from surfaces of alloy, leaving porous surface. Then, and after thorough washing and drying, these casts can be fairly successfully coated, as the reactive metals are no longer on surfaces of alloy, and pores left on surfaces of alloy acts as better foothold for coatings to bond to metal.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check