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When People Say Armoloy Coating What Does That Mean?
Armoloy is a low-temperature multistate process of electro coating based upon chrome-plating technology. Instead of normal chrome-plating solutions, however, the national and internationally franchised operators of the process obtain their chemicals directly from the technique's developer. The proprietary coating solution and procedure is rigidly controlled to produce superior results.
The process involves clearing and removing the matrix on the metal's surface by chemical and mechanical means. The proprietary process causes the metallic elements to permeate the pores of the metal, actually becoming a part of the metal itself and insuring a positive, lasting bond between the basis metal and the hard Armoloy surface.
The special coating can be applied to all ferrous and nonferrous metals, but is not recommended for aluminum, titanium, or magnesium; metals not commonly used in the construction of molds or machinery for plastics processing. The process has no effect on the basis metal to which it is applied, nor does it build up on corners or sharp edges in the manner of other plating materials.
Based on the substrate metal being coated, the deposited Armoloy has an equivalent hardness value of 70 to 72 Rc. The use of similar or identical materials as opposing bearing surfaces is acceptable due to this high hardness rating.
Hydrogen embrittlement, which is a factor in some plating processes, is not likely to occur with the coating corrosion resistance coating. The coatings surface preparation and processing control prevents the embrittlement phenomenon from occurring
The coating thermal shock tolerances are almost unbelievable - from -400F to over 1600F. At elevated temperatures above 1200F, The coating will react with certain materials such as carbon monoxide, sulfur vapor, and phosphorus. However, for the tool making industry, these do not represent any problem. At temperatures above 700F, hardness and wear resistance will change to some degree, but this is not a factor in coating cavity parts for die-casting molds.
The corrosion resistant coating is used to protect both metal and plastics molds, even though the continuous effects of hot metal injected into die-casting molds represent one of the toughest wear problems. Even the hot work series of alloy steels
(H-13) are not able to stand up continuously to the effects of the heating and cooling cycles demanded of the mold.
In addition, the use of mold releases can cause a build-up of release residue on the cavity surface to the point where the mold must be removed from the press and cleaned and polished. Armoloy improves the lasting qualities of the mold on both problems: heat checking and release build-up.
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