Problem

  • Offshore oil platforms, refineries, and other such facilities typically operate in a humid, aggressive corrosion environment. Corrosion of automation systems, electrical control boxes, retail fuel pump meters, connectors, contacts, relays, switches and printed circuit boards, causes unscheduled maintenance and reliability issues at these facilities. Few enclosures containing electrical equipment can be economically protected by air conditioning or a fully hermetic vacuum seal. Even explosion-proof housings aspirate ambient air through the long thread channel of the cast housings and by diffusion through seals and gaskets. Traditional protection methods such as painting, greases, electrical heaters inside control boxes to prevent condensation, etc. are not effective.
  • Problems caused by electrical equipment corrosion include resistivity changes and intermittent contact failures in critical alarm and control functions, added local heating and power loss in critical components, solderability issues for circuit boards, changing the calibration of analog meters and, ultimately the integrity of cabinets are compromised.

Solution

Zerust’s AutoFog A is a revolutionary Flash Corrosion Inhibitor (FCI™) that diffuses rapidly to provide corrosion protection for bare metal surfaces. The unique rapid diffusing action allows corrosion inhibition of pipelines, voids and other enclosed spaces without the need for power sprays or mechanical fogging of powders.

Largest protection volume of any diffuser in its class Combination of FCI and phased release Zerust® VCI’s allows for long-term protection of metal assets Effective in the presence of acid gas contaminant Diffusion rate of 1 m every 30 minutes

The FCI action is especially important when welding shut voids and in enclosed spaces where sweating due to trapped humidity inside the void can cause immediate corrosion.
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Product Use

Voids and Enclosed Spaces:
AutoFog ® diffusers can be placed inside a void or enclosure before it is welded shut or sealed.They can be fixed in place with a wire mesh basket for easy retrieval and replacement. In certain applications the diffuser packaging may be slit and the Zerion ® powder poured into the void to provide protection.

Asset Preservation:
The asset to be preserved should first be cleaned and then enclosed. The enclosure could be either a containment packaging of Zerust ® corrosion inhibitor film or an integral self-sealing piece of equipment. AutoFog diffusers are then placed inside the void or enclosure before it is sealed.

Benefits

  • Fast-acting corrosion protection
  • Easy-to-use, with no need for additional mechanical fogging equipment
  • Quick/simple installation and removal with minimal training
  • Inexpensive solution for aggressive environments
  • Highly effective and unique

Product Properties

  • pH: > 8-10 for 1% solution
  • Odor: Amine-like
  • Appearance: Light tan, off-white powder
  • Packaging: Breathable sachet contained in an outer leakproof bag
  • Product may have an unpleasant, but non-toxic odor that will dissipate within a few hours

Effectiveness

  • Determine the correct number of AutoFog packets needed to protect intended space. Do not overload protection.
  • Remove from plastic packaging, but do not puncture product Place packet nearest to the center of the space as possible. If using multiple packets, distribute them evenly. Direct contact with ferrous metals is ok. Do not place in direct contact with yellow metals (brass, copper, zinc).
  • Seal package or enclosure to contain vapor corrosion inhibitors inside
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How To Use In Shipment And Storage

  • Determine the correct number of AutoFog packets needed to protect intended space. Do not overload protection.
  • Remove from plastic packaging, but do not puncture product Place packet nearest to the center of the space as possible. If using multiple packets, distribute them evenly. Direct contact with ferrous metals is ok. Do not place in direct contact with yellow metals (brass, copper, zinc).
  • Seal package or enclosure to contain vapor corrosion inhibitors inside.
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