Base Material Hardness
As the hardness and surface finish of base metals are increased, the performance of the Armoloy coating also improves. To maximise Armoloy performance, components should be engineered to a minimum of 50 HRc. The high hardness resists indentation and ploughing of the coating subsurface. Typically the lower the direct load on the surface, the lower the base material hardness can be.
Suitable Base Materials
|All Ferrous Metals||Aluminium (pre-coat of E-Nickel)|
|Tool Steels: DIN1, 2379, K110, D2, K340, K460, K600, Gauge Plate, H13, S7, EN19, EN24, etc||All Stainless Steels (300 and 400 Series, Inconel, 17 – 4PH, etc.)|
|Bearing Steels (52100, 8620, etc.)||Beryllium Copper Alloys / Ampoco®|
|Induction Hardened / Carburised Steel||Copper and Copper Alloys|
|Cast Irons||Bronze / Brass|
|Magnesium and titanium are substrates NOT recommended for the Armoloy® coating.|
Although Armoloy does impart significant corrosion resistance to ferous materials, it must be noted that this does not make the product corrosion proof. Also since the Armoloy provides corrosion resitance through barrier protection, should the coating be breached in any way, base material would be exposed making it succeptable for corrosion. If corrosion is a primary concern, consider a pre-coat of Electroless nickel before armoloy which significantly enhances overall corrosion resistance.
Another way we can increase the corrosion resistance of all chrome plated layers, not just Armoloy, is to treat the area of concern with a special polymer layer – which is called MLP. This polymer is worked into the surface of the chrome and helps to seal any micro-cracks and pores that may provide passage through to the base material. This also has an advantageous dry running effect as the friction co-efficient is further reduced.
Through experience we have noted that Armoloy tends to perform its best after an initial run in period this is especially true in very tight fits with minimal clearance. If you are concerned about increased intial fricton, we have seen good results in combining our Dry Film Lubricant on top of the Armoloy layer. This decreases running friction measurably and allows the Armoloy to "settle in"with reduced risk of seizure.