Cortec® Temporary Coatings and Removable Rust Preventatives

ECORR Systems provides Cortec® temporary corrosion-protection coatings for metal parts, machinery, equipment, structural steel, vehicles, piping, flange faces, and industrial components. These products help protect metal during manufacturing, shipment, outdoor exposure, equipment layup, seasonal storage, and long-term preservation.

As an Authorized Cortec® Distributor, ECORR Systems offers water-based, solvent-based, oily, wax-like, dry-film, and removable temporary coatings. Available formulations support stationary surfaces, moving parts, painted equipment, bare metal, and demanding indoor or outdoor environments.

What Is a Temporary Corrosion-Protective Coating?

A temporary coating forms a protective film on metal during a defined period of storage, transportation, production delay, or equipment inactivity. Unlike a permanent coating system, a temporary coating is generally selected with later removal, cleaning, or recommissioning in mind.

Cortec® temporary coatings may combine direct barrier protection with Vapor phase Corrosion Inhibitor technology. The applied film protects the surface it covers, while VpCI® molecules can provide additional protection to nearby recessed or difficult-to-reach metal surfaces.

Common Temporary Coating Applications

• Industrial equipment layup and mothballing
• Machinery stored between production cycles
• Metal parts awaiting assembly or installation
• Domestic and overseas equipment shipment
• Outdoor storage and laydown yards
• Oil and gas equipment preservation
• Marine and offshore equipment
• Pipeline segments, valves, and flange faces
• Structural steel and fabricated assemblies
• Heavy equipment and vehicle components
• Tools, dies, molds, and fixtures
• Bearings, shafts, gears, and machined surfaces
• Fasteners, threads, hinges, and moving parts
• Work-in-process metal components
• Critical replacement parts and spare inventories

Why Use a Removable Protective Coating?

Metal parts and equipment may require more direct protection than packaging alone can provide. This is especially true when equipment will remain outdoors, experience salt spray, travel on an open truck or vessel, or remain exposed during an extended construction or maintenance delay.

A removable coating provides a physical barrier against moisture and corrosive contaminants while allowing the protected item to be cleaned and returned to service later. Depending on the product, removal may be completed with an alkaline cleaner, pressure washing, or another recommended cleaning procedure.

VpCI®-368 Heavy-Duty Removable Coating

VpCI®-368 is a solvent-based temporary coating that dries to a wax-like film. It provides multi-metal protection for harsh outdoor and unsheltered environments where a durable removable barrier is required.

Common applications include stationary machinery, flange faces, structural components, exposed equipment, replacement parts, offshore assets, and metal products stored or shipped in aggressive environments.

VpCI®-368 is available in multiple formats, including standard concentrate, diluted versions, military-qualified variations, and CorShield® VpCI®-368 aerosol for convenient application. The coating is typically removed using an appropriate alkaline cleaner such as a compatible product from the VpCI®-41x Series.

VpCI®-369 Protection for Moving Parts

Moving or lubricated components may require a softer protective film that provides corrosion protection without preventing normal movement. VpCI®-369 is an oil-based rust preventative and lubricant designed for compatible moving metal components.

Potential applications include bearings, hinges, shafts, gears, wire rope, chains, fasteners, valves, and other rotating or reciprocating equipment. It may be used for equipment operating intermittently or placed into layup.

VpCI®-369 is available in standard, diluted, and aerosol formats. Load, speed, operating temperature, lubricant compatibility, seals, and equipment-manufacturer requirements should be evaluated before use.

VpCI®-391 Water-Based Temporary Coating

VpCI®-391 is a fast-drying, water-based temporary coating that leaves a hazy, dry, non-tacky film. It provides multi-metal protection and ultraviolet resistance for compatible metal surfaces in outdoor and unsheltered environments.

VpCI®-391 can be used on machinery, heavy equipment, structural steel, piping, vehicles, handrails, painted equipment, and exposed components. Its dry finish makes it useful where an oily or wax-like surface would be undesirable.

The product may also be used for temporary protection of compatible surfaces before welding. Welding procedures, surface preparation, coating thickness, and project requirements should still be evaluated before application.

Water-Based Temporary Coatings

Water-based temporary coatings can provide corrosion protection with reduced reliance on conventional solvent-based chemistry. Depending on the formulation, they may offer lower VOC content, easier cleanup, a dry finish, and compatibility with painted or unpainted metal surfaces.

Water-based products require proper storage, surface preparation, application temperature, drying, and protection from freezing. Environmental conditions during application can affect film formation and final performance.

Solvent-Based Temporary Coatings

Solvent-based temporary coatings may provide faster drying, water displacement, or more durable protection in aggressive environments. They are often selected for outdoor exposure, overseas transportation, offshore equipment, and long-term preservation.

Application requires appropriate ventilation, ignition control, personal protective equipment, and compliance with facility VOC and safety requirements. Always review the current Product Data Sheet and Safety Data Sheet.

Dry-Film, Oily, and Wax-Like Protection

Temporary coatings are available with different film characteristics. The correct finish depends on how the protected equipment will be handled, stored, inspected, and returned to service.

• Dry, non-tacky films: Useful when a clean surface, reduced dust collection, or continued handling is important.
• Oily or wet films: Appropriate for moving parts, lubricated surfaces, and components that benefit from water displacement.
• Wax-like films: Provide a more durable barrier for stationary surfaces and harsh outdoor exposure.

Equipment Layup and Mothballing

Equipment placed into standby or long-term layup can corrode when normal operation stops. Temperature changes may create condensation, while salt, humidity, process residue, and industrial contaminants remain on exposed surfaces.

A layup program may use VpCI®-368 on stationary surfaces, VpCI®-369 on moving components, and VpCI®-391 on structural steel or painted equipment. Internal systems may require additional fogging products, fluid additives, emitters, or VpCI® packaging.

Each treated component should be documented with the product used, application date, inspection schedule, and required recommissioning procedure.

Temporary Protection During Shipping

Machinery and metal components may encounter rain, road spray, salt air, high humidity, and changing temperatures during transportation. Open flatbed freight and overseas shipments present especially demanding conditions.

Temporary coatings can protect exposed surfaces during transit and may be combined with VpCI® film, shrink film, fabric, emitters, and other packaging materials. This integrated approach provides direct surface protection and a corrosion-inhibiting environment around the equipment.

Outdoor Equipment Storage

Outdoor storage exposes equipment to rain, condensation, ultraviolet light, wind, salt spray, dust, and industrial pollutants. Water can collect on horizontal surfaces, inside cavities, and around fasteners or joints.

A coating selected for outdoor use should provide the required film strength, water resistance, ultraviolet resistance, and protection duration. Standard indoor rust preventatives should not be assumed suitable for prolonged outdoor exposure.

Flange-Face and Pipe-End Protection

Machined flange faces and prepared pipe ends can corrode during fabrication, outdoor storage, construction delays, and transportation. Pitting or rust on these surfaces can interfere with sealing, welding, or installation.

VpCI®-368 provides a durable wax-like barrier for flange faces exposed to harsh conditions. VpCI®-391 provides a dry, water-based option for compatible pipe ends, weld areas, and other surfaces where a less visible coating is preferred.

Surface-finish requirements, gasket compatibility, welding procedures, coating removal, and commissioning requirements should be evaluated before application.

Protection for Structural Steel

Structural steel, railings, supports, frames, and fabricated assemblies may remain exposed during construction, transportation, facility shutdown, or offshore layup. Bare edges, fasteners, welds, and damaged painted areas are common corrosion points.

VpCI®-391 can be applied to compatible painted and unpainted steel to provide an additional temporary protective film. More durable wax-like products may be appropriate for highly exposed stationary components.

Machinery, Tools, Dies, and Mold Protection

Machinery, tools, dies, and molds often contain precision surfaces that must remain free from rust between production runs. Coolant residue, fingerprints, condensation, and humid storage conditions can create corrosion even when equipment is stored indoors.

Cortec® temporary coatings can be sprayed, brushed, rolled, or dipped onto compatible surfaces. The selected product should be removable using a method that does not damage polished surfaces, dimensional tolerances, seals, or downstream processes.

Work-in-Process Corrosion Protection

Metal components may wait between machining, forming, inspection, assembly, heat treatment, and finishing. Delays during production can expose freshly processed surfaces to flash rust and staining.

A thin temporary coating can protect compatible components during these hold periods. Downstream welding, painting, plating, bonding, cleaning, and assembly requirements should be considered before selecting the coating.

Temporary Coatings for Painted Equipment

Certain Cortec® temporary coatings can be applied over compatible painted equipment to provide additional corrosion protection. This may be useful for machinery, vehicles, structural components, and offshore equipment stored in aggressive environments.

Compatibility should be tested before broad application. Existing paint type, age, condition, color, gloss, cleaners, and removal methods may affect results.

Combining Temporary Coatings with VpCI® Packaging

Temporary coatings and VpCI® packaging can be used together when equipment requires both direct surface protection and a protected enclosed atmosphere. This combination is useful for machinery, export shipments, outdoor storage, and long-term preservation.

A typical system may include:

• Cleaning and drying the equipment
• Removing existing rust where necessary
• Applying a temporary coating to exposed surfaces
• Lubricating moving components with an appropriate product
• Fogging internal cavities with a compatible VpCI® inhibitor
• Installing emitters or VpCI® foam where needed
• Wrapping the equipment with VpCI® film, fabric, or shrink film
• Adding access panels for inspection when appropriate

Surface Preparation

Temporary coatings perform best when applied to properly prepared surfaces. Dirt, salts, rust, oil, grease, moisture, and incompatible coatings can reduce adhesion and corrosion-protection performance.

Surface preparation may include cleaning, degreasing, rust removal, rinsing, drying, or treatment with a compatible surface-preparation product. The required preparation depends on the selected coating, substrate, contamination, and exposure conditions.

Application Methods

Depending on the product, Cortec® temporary coatings may be applied by:

• Aerosol spray
• Conventional or airless spray equipment
• Brush
• Roller
• Dip application
• Automated production equipment

Application equipment, wet-film thickness, dry-film thickness, coverage, temperature, humidity, ventilation, and drying time should follow the current product instructions.

Removing a Temporary Coating

Removal requirements vary by product. Some coatings can be removed with an alkaline cleaner and pressure washing, while oily films may require degreasing. Certain thin films may be allowed to remain for a compatible next step.

The removal method should be established before the coating is applied. Facilities should consider wastewater collection, surface compatibility, confined spaces, residue, cleaning access, and the condition required for recommissioning.

Temporary Coatings Compared with Permanent Coatings

Temporary coatings are intended primarily for preservation during storage, shipping, manufacturing delays, maintenance, or equipment layup. Permanent coatings are designed to remain part of the asset’s long-term protective system.

A temporary coating should not automatically be used as a substitute for a permanent primer, topcoat, tank lining, pipeline coating, marine coating, or other engineered protective system.

Cortec® Product Categories for Temporary Protection

» Temporary Coatings and Rust Preventatives
For machinery, equipment, structural steel, flange faces, moving parts, work-in-process components, storage, and shipment.

» Cortec® Corrosion-Inhibiting Coatings
Browse temporary and longer-term coatings for compatible metal surfaces in indoor, outdoor, industrial, and marine environments.

» Cleaners, Degreasers, and Rust Removers
For preparing metal surfaces before coating and removing compatible temporary coatings before equipment returns to service.

» Corrosion-Inhibiting Lubricants
For moving parts, bearings, gears, chains, wire ropes, hinges, and other components that require lubrication during operation or layup.

» VpCI® Packaging and Equipment Layup Products
For combining direct-applied coatings with films, fabrics, emitters, foams, and internal corrosion protection.

Benefits of Cortec® Temporary Coatings

• Protects metal during storage, shipping, and layup
• Provides options for indoor and outdoor exposure
• Offers dry, oily, soft, and wax-like protective films
• Includes water-based and lower-VOC options
• Protects stationary and moving equipment components
• Can be applied over compatible painted or bare metal
• Supports brush, spray, roller, dip, and aerosol application
• Offers removable protection for recommissioning
• Can be combined with VpCI® packaging systems
• Helps reduce corrosion-related rework and replacement

Selecting the Right Temporary Coating

Temporary coating selection should begin with the substrate, surface condition, environment, protection period, required finish, application method, and removal process.

Important considerations include:

• Metal type and existing surface finish
• Painted or unpainted condition
• Stationary or moving component
• Indoor, outdoor, marine, or industrial exposure
• Temperature, humidity, salt, and ultraviolet exposure
• Desired dry, oily, or wax-like film
• Application equipment and drying conditions
• Required protection period
• Inspection and handling requirements
• Removal and recommissioning procedures
• Compatibility with welding, painting, and assembly

Why Choose ECORR Systems?

ECORR Systems is an Authorized Cortec® Distributor helping manufacturers, equipment owners, maintenance contractors, exporters, facility managers, and industrial buyers identify appropriate temporary corrosion-protection coatings.

Whether you need a dry water-based film, heavy-duty removable coating, protective lubricant for moving parts, flange-face coating, or complete equipment-layup system, ECORR Systems can help evaluate the metal, surface condition, environment, application method, and required protection period.

Frequently Asked Questions

What is the difference between temporary and permanent coatings?

Temporary coatings protect metal during manufacturing, transportation, storage, or layup and are generally selected with later removal or recommissioning in mind. Permanent coatings are designed to remain as part of the asset’s long-term protective system.

Which Cortec® coating is used for harsh outdoor conditions?

VpCI®-368 is a wax-like removable coating commonly selected for stationary metal surfaces in harsh outdoor and unsheltered environments. VpCI®-391 provides a water-based, dry-film option with ultraviolet resistance for compatible surfaces.

Which temporary coating is used for moving parts?

VpCI®-369 is an oil-based rust preventative and lubricant used for compatible moving or lubricated components such as bearings, shafts, hinges, gears, chains, and wire ropes.

Does Cortec® offer water-based temporary coatings?

Yes. Cortec® offers water-based products such as VpCI®-391 for compatible equipment, structural steel, piping, vehicles, and other metal surfaces.

Can temporary coatings be applied over paint?

Certain Cortec® products may be applied over compatible painted surfaces. A test area is recommended because paint chemistry, age, condition, gloss, color, coating thickness, and removal methods can affect compatibility.

Can Cortec® temporary coatings protect flange faces?

Yes. Removable coatings such as VpCI®-368 and VpCI®-391 may be used for compatible flange faces and pipe ends. Required surface finish, gasket compatibility, welding, cleaning, and commissioning procedures should be considered.

How are Cortec® temporary coatings removed?

Removal depends on the product. Some coatings can be removed with a compatible alkaline cleaner and pressure washing, while oily films may require degreasing. Always follow the current product instructions.

Do temporary coatings need to be removed before welding?

Requirements vary by product and welding procedure. Cortec® reports that properly applied VpCI®-391 can be used for temporary protection before welding, but project specifications, coating thickness, ventilation, and approved welding procedures must still be followed.

Can temporary coatings be combined with VpCI® film?

Yes. Direct-applied coatings can be combined with VpCI® films, shrink films, fabrics, emitters, and foams to provide additional protection during shipping, outdoor storage, and equipment layup.

Can ECORR Systems help select the right temporary coating?

Yes. ECORR Systems can help review the metal, surface condition, existing paint, equipment movement, exposure, application method, desired film, protection period, and removal requirements to identify an appropriate Cortec® product.