X-Corrode Packets provide protection against airborne contaminants that cause corrosion, such as Hydrogen Sulfide (H2S), Chlorine (Cl2), and salts. The X-Corrode formula provides a durable passivation of the surface of circuit component metals; other metals, such as aluminum and steel that may be present in an enclosure, are also passivated, but to a smaller degree. Tests have shown that once a metal surface was initially passivated by X-Corrode, the packet could be removed with corrosion protection remaining for weeks after. This means that frequently opened enclosures are also well protected by the X-Corrode packet.
When a packet is removed from its shipping bag and placed in an enclosure, the granules begin to slowly vaporize. The vapors diffuse through the packet material into the surrounding air space. Metal surfaces contacted by the vapor become passivated against corrosion by airborne contaminates. Metals commonly associated with electrical and electronic components receive maximum protection. These may include copper, copper alloys, tin, lead, zinc, chromate passivated iron, silver, cadmium and nickel chrome plate. Most other metals, including iron and aluminum, are also passivated, but not to the extent of protection afforded to copper and its alloys. Non-metal surfaces are not affected by the vapor. Vapors are carried throughout the enclosure by diffusion and thermal convection. As the air within the enclosure becomes saturated with X-Corrode vapors, vaporization of the inhibitor compound diminishes to the minimum rate required for replenishing lost vapor. The vapor concentration is typically in the lower parts per million range and, therefore, does not present any flammable or explosive hazard.
Typically, these packets last up to two years. X-Corrode packets are frequently used in conjunction with Humidisorb packets. Together they provide long-term moisture and corrosion control.
Additional information such as a Selection Guide and material safety data sheets are available.