VpCI®-649 BD/VpCI®-649 BD MF


VpCI®-649 BD is a unique concentrated liquid formulation designed to provide long-term protection for ferrous and nonferrous metals in water and glycol closed-loop systems. VpCI®-649 BD is effective at corrosion protection during hydrostatic testing


VpCI®-649 BD combines contact and volatile corrosion inhibitors, along with anti-scalant and an organic dispersing agent. The product does not contain nitrite, phosphate, or chromate.
VpCI®-649 BD is available in a molybdate-free version: VpCI®- 649 BD MF.


VpCI®-649 BD is available in 5 gallon (19 liter) pails, 55 gallon (208 liter) drums, liquid totes, and bulk.
To ensure best product performance, store in original packaging, indoors, and out of direct sunlight at 40-100 oF (4-38 oC).
Shelf life: 2 years.



• Effective for a broad range of applications to stop aggressive corrosion in systems containing fresh water or glycol coolants
• Low concentration effectiveness provides economical treatment
• Vapor phase action provides protection to areas that contact inhibitor cannot reach
• Protects steel, copper, galvanized steel, and aluminum
• Contains an acrylic polymer to prevent scale formation
• VpCI®-649 BD contains molybdate tracer
• VpCI®-649 BD MF contains a PTSA tracer
• Contains organic dispersing agent




Appearance Yellow to Amber Liquid
Density  9.3-9.8 lb/gal (1.12-1.18 kg/L)
Type Water-Based
pH 9.1-9.6 (Neat)
Freeze Point 1 to 10 °F (-17 to -12 °C)



• Closed loop cooling systems
• Hydrostatic testing of pressurized vessels and pipelines
• Cooling system lay-up
• Packer fluid additive
• Prevents water-bottom corrosion in oil storage tanks
• Fire extinguishing system dry layup


Protection Length

Volume VpCI®-649
BD per 100 gal
Volume VpCI®-649
BD per 100 L

Dosage (%)



During Testing
& Operational

0.3 gallons
(38 ounces)
300 mL 0.3 3000
Up to 6 months  0.5 gallons
(64 ounces)
500 mL 0.5 5000
6-12 months 1   gallon 1 L 1 10.000
12-24 months 1.5 gallons 1,5 L 1.5 15.000


*These are general dosing guidelines and may not be suitable for every application. Please contact Cortec® Technical Service for specific dosage information.


Detection: Concentration of VpCI®-649 BD can be monitored via molybdate tracer, pH, or refractometer. Concentration of VpCI®-649 BD MF can be monitored via pH, refractometry, or PTSA. Contact Cortec® Technical Service for more information on monitoring product concentration.




Method Description Results
ASTM G 31  Immersion Corrosion Testing

No corrosion on carbon steel, copper galvanized,
aluminum (0.3% wt in tap water)



The PTSA tracer used in VpCI®-649 BD MF degrades with exposure to light. Solutions of VpCI®-649 BD MF must be sheltered from light to retain PTSA tracer. If PTSA degrades,
the concentration can still be monitored via a titration. Contact DEYAP Technical Service for more information.