Product Announcement from General Magnaplate Corporation
Synergistic" Surface Enhancement Technology Maximizes Corrosion Resistance and
Hardness of Aluminum and Aluminum Alloys
- Maximum Corrosion Resistance
- Withstands salt spray (MIL-A-8625 and ASTM B-117) exposure in excess of 15,000 hours - 44 times the MIL-SPEC of 336 hours
- Permanent Dry Lubricity
- Chemical Resistance
- Increased Hardness - up to the equivalent of Rc 65
- High Dielectric Strength
- Mold Release
- Low Coefficient of Friction
- Perfect Bond To Parent Metal
- Moisture Resistance
- FDA/NSF Compliant (HCR-F)
- Exceeds MIL-A-63576
- Conversion Coatings
- Excellent resistance to extreme heat and ultraviolet light
- Wear resistance - Equilibrium wear rate using Taber abrasion testing method #6192 of FED STD #141 (CS-17 wheel): 0.275mg per 1000 cycles. Exceeds MIL SPEC requirements by up to 35%.
- Temperature range from -110°F (-79°C). Parts can also operate effectively at temperatures as high as 600°F (316°C) at intermittent operating conditions.
- Excellent dielectric characteristics and insulator. Coating won't break down - even at 2,000 volts.
Almost all cast, forged, extruded or wrought aluminum alloys can be treated. Alloys that contain less than 5% copper and 7% silicon and do not contain lead are most suitable for the application of an HCR coating. The degree of hardness, penetration and color varies with each alloy, with the processing temperature, and with the coating thickness.
NASA tests¹ of Shuttle parts indicate that parts coated to a thickness of 51 microns (2.0 mils) "should provide superior corrosion protection for a prolonged period of time."
MAGNAPLATE HCR-F is compliant for use in "food contact involving repeated use, such as food processing equipment." ²No other surface enhancement coating can give aluminum parts 10,000 hours of salt spray corrosion resistance in food contact applications and meet the NSF 51 standard.
General Magnaplate HCR's coating thickness is consistently uniform and ranges from 0.001-0.0025" per side. Precise control of coating thickness (+-10%) permits use on close-tolerance parts such as prebalanced impellers and threaded members. By undersizing the outside diameter by two times and pitch diameter by four times (for 60 degree thread forms) of the desired coating thickness, the original thread size can be maintained after coating. for machining allowances, note that overall final thickness of the coating is influenced by two factors; A Penetration B. Growth.
The finish of the surface after MAGNAPLATE HCR application will be equal to or slightly rougher than the original surface. While not recommended, slight burnishing, lapping, or honing can be performed on a coated part, if necessary. However, removal of the surface material should be no more than 0.0002". For machining allowances, note that overall final thickness of the coating is influenced by two factors: A. Penetration B. Surface Growth
Enhanced aluminum exhibits rapid heat and cold transfer. By converting an original single flat aluminum crystal into millions of surface facets, MAGNAPLATE HCR permits heat distribution within the encapsulated outer surface that surpasses that of untreated aluminum. The proprietary polymers used in the impregnation process have a heat conductivity of 1.7 ± .03 Btu/hr/sq. ft/deg. F/in and a heat capacity of 0.25 Btu/lb/deg. F.
About General Magnaplate:
As the world leader in surface-enhancement coatings, General Magnaplate solves wear, corrosion and lubrication problems throughout many industries including manufacturing, food processing, oil and gas, medical diagnostics, pharmaceuticals, aerospace, semiconductors and many more. Please see the industries section of our site for more details on the typical applications we process on a daily basis.
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