VpCI Powder with Silica – 100 lb (Cortec® VpCI®-609 S)

Description

VpCI®-609 S is the silica-containing grade of VpCI-609, Cortec’s water-soluble vapor phase corrosion inhibitor powder for ferrous metals and aluminum. The silica is there to reduce clumping in storage so the powder flows freely through a blast pot or vacuum when fogged; the inhibitor chemistry, metals and dosages are those of VpCI-609. The 100 lb drum fogs 3,200 to 5,300 cubic feet of void.

Cortec’s powder fogging guide names VpCI-609 S alongside VpCI-308 S and VpCI-309 as the versions formulated with silica to resist clumping, and notes that clumps in any powder do not reduce efficacy but do have to be broken apart before fogging. Cortec’s VpCI-609/609 S data sheet gives the S grade its own pH (5.9 to 6.9) and bulk density but shares one dosage table, so the figures on this page are the VpCI-609 figures: 0.3 to 0.5 oz per cubic foot dry, 4 to 8 % in hydrotest water, up to 24 months of protection, and the same caution from the Cortec Product Consultation Guide not to use it with copper or brass. Confirm any figure that matters to a specification against the current VpCI-609 S product data sheet.

Typical applications

• Tubular structures, pipes and vessels
• Internal surfaces of equipment
• Hydrostatic testing
• Shipping and storage protection
• Dry fogging of large steel voids where free-flowing powder matters
• Boiler and steam-side dry lay-up
• Fresh-water hydrotest of cast iron and steel components

How to apply VpCI-609 S

1. Surface preparation. SSPC-SP-1: clean and, for dry fogging, completely dry.
2. Dry fogging. Break up any clumps. With a gravity-fed sandblaster at 60 to 100 psi and a 1/4 to 3/8 inch nozzle, or a shop vacuum set to blow, fog 0.3 to 0.5 oz per cubic foot (300 to 500 g/m³) into an enclosure sealed to two openings. Fog until powder exits the second opening, cap it, finish the dose and seal the inlet. Powder travels up to 100 feet through piping.
3. Wet use. Dissolve at 4 to 8 % by weight in hydrotest or standing water as for VpCI-609. Hold at hydrotest pressure for at least an hour, drain, and close the vessel without air-drying or purging.
4. Protection. Up to 24 months sealed. For longer, install coupons at the entry port and re-dose as needed.
5. Return to service. Water-soluble; a rinse or the first fill removes it.
6. Storage. Keep the moisture-barrier bag sealed inside the drum.

Where it fits in the Cortec line

Buy VpCI-609 S when the powder will be fogged through equipment and free flow matters; buy standard VpCI-609 for dissolving in hydrotest water. For assemblies with copper or brass use the multi-metal VmCI-307 or VpCI-308 pouches; for ferrous dry lay-up with a slower depletion rate, VpCI-309. As a blasting-media and hydrotest additive it pairs with the abrasive blast rooms we build. Browse the full Cortec VpCI line.

Field notes

A Barcelona shipyard treats the unpaintable void spaces of a superyacht with VpCI-609 S fogged through a few access points, corrosion coupons hung inside and flanges closed. With coupons still clean at 12 months, the reapplication interval was extended to 24 months; each treatment takes two days or less. (Cortec Case History #801)

An Indonesian fabricator of reactors, vessels, columns and drums ran VpCI-649 BD at 0.5% in hydrotest water and then applied VpCI-609 at 400 g per m³ to all equipment for six months of protection through shipping and storage. The fabricator dropped its nitrogen purge. (Cortec Case History #698)

A Saudi steel fabricator needed up to two years of protection on new pressure-vessel internals through transit and site storage. VpCI-609 is fogged in with compressed air at 500 g per m³ of void space and the inlets and outlets sealed; no corrosion problems since adoption. (Cortec Case History #558)

Specifications

Note	Shares the VpCI-609 data sheet: same dosage, protection and metals; Cortec recommends the S grade for dry fogging because regular VpCI-609 tends to clump
Silica grade	Formulated with silica to reduce clumping; clumps do not reduce efficacy
Base product dosage	VpCI-609/609 S: dry 0.3–0.5 oz/ft³ (300–500 g/m³); wet — pre-dissolve in water, or use VpCI-609 W liquid at 4–8% for hydrotesting
Protection (VpCI-609 basis)	Up to 24 months
Metals (VpCI-609 basis)	Ferrous metals and aluminum; do not use with copper or brass
pH	5.9–6.9 (1% in water)
Bulk density	37–38 lb/ft³ (0.59–0.61 kg/L)
Fogging equipment	Gravity-fed sandblaster, 60–100 psi, 1/4–3/8 in nozzle; or shop vacuum in reverse
Storage	Original packaging, indoors, out of direct sunlight, 40–100 °F (4–38 °C); shelf life 2 years
Packaging	Moisture-barrier bags in fiber-lined drums
Size	100 lb
Shipping weight	109 lb (49.4 kg)
Availability	In stock
Cortec product number	13900426

Solvent Recycling Systems is an authorized Cortec® distributor. See the full Cortec VpCI line, browse the VpCI product selection guide, or contact us for volume pricing and lead times.