What is an ANCHOR PATTERN, and how do I get it? We
hear that question a lot, and maybe this will help answer those questions.
The anchor pattern or profile is extremely important to protective
coatings in that it provides for excellent coating adhesion. Coatings
manufacturers specify the optimal profile needed to achieve maximum
coating adhesion for each different coating.
Anchor pattern can be thought of as tiny peaks and valleys in the
substrate being blasted. The depth of these “valley’s” is
determined by the size, type and hardiness of the abrasive being
used; by the air pressure; and by the distance and angle of the
nozzle to the surface. Too much anchor pattern wastes coating and
allows substrate to show through; too little anchor pattern reduces
the bonding surface between the material and the substrate.
Typically anchor pattern is expressed in mils, microns or millimeter
1mil = 1/1,000 in.
25 microns = 1 ml
25.4 millimeters = 1 in.
39 mils = millimeter
Pressure, distance from the surface and angle can effect the anchor
pattern but following are some general guidelines on how to achieve
specific anchor patterns. Assumption is 90PSI nozzle pressure,
2 feet from surface:
Abrasive sizes vary and a tolerance of 10% should
be maintained to expect these results, especially where abrasives
are reclaimed and re-used. Reclaimed abrasives should be angular,
not rounded and free from oil, grease, iron oxide, etc.
Sandblasting Equipment offers blast equipment, supplies, parts and
accessories for sale and select blast equipment is available for rent.
We service most equipment that we sell or rent. We do not offer blasting
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