Combo Coatings

For Graphite Parts such as rotors or stators used with degassing units where moving molten metal requires toughness and abrasion-resistance, yet non-wetting is also desired.

• FIRST COATING: Coverguard (or MW-50 or SC-1600)
• TOP-COATING: Boron Nitride Lubricoat

Note: The coatings are compatible since both have pH-Acidic (like lemon juice) systems.

For wheel casting & permanent-mold casting, this “combo” is regularly used in order to achieve the thermal-insulation undercoat but have the best non-wetting, release, and surface finishes.

• FIRST COATING: Standard thermally-insulating mold coating
• TOP-COATING: Boron Nitride Releasecoat

Note: The coatings are compatible as BN-Releasecoat is pH-near-Neutral and OK with all pH paints.

For metal parts such ladles where a hard undercoat is desired, yet the best non-wetting is also desired.

• FIRST COATING: Boron Nitride Hardcoat
• TOP-COATING: Boron Nitride Lubricoat-ZV

Note: The coatings are compatible since both have pH-Basic/Alkaline (like housepaints) systems.

For Ceramic parts such as sintered-fused-silica where some surface sealing is desired along with non-wetting.

• FIRST COATING: Z-Guard
• TOP-COATING: Boron Nitride Lubricoat (regular version)

Notes: The coatings are compatible since both have pH-Acidic (like lemon juice) systems.

The Z-Guard is thin and penetrating, but penetration/sealing can be improved with vacuum-assist if available

For used hot-top billet casting tables that have residual Bone Ash or Red Mud on them – to seal the dust in and protect from its interaction with BN coatings.

• FIRST COATING: Z-Primercoat (see BINDERS for details about Z-Primercoat)
• TOPCOATING: Boron Nitride Lubricoat (regular version)

Note: Z-Primercoat is “forgiving” and, even though it is pH-Basic, allows topcoating with either pH-Acidic (like regular BN Lubricoat) or pH-Basic coatings.  Z-Primercoat is just like housepaint primers in this application.