Prevention of Corrosion

One of the major causes of corrosion is Presence of Moisture or Humidity in the atmosphere. For protection of metal parts, components and other products form corrosion and rust, Various Options are Available, like “Oiling & Greasing”, “VCI Paper”, “VCI Poly Bags” and also use of “Moisture Barrier Bags”. Each option has its merits and demerits.

There are, however, Two Basic Ways to Protect Metal Parts and components from corrosion:

  • Moisture Barrier Poly Bags
  • VCI Poly Bags


Though both the above methods protect the metal products in one way or the other, their System of Functioning is Entirely Different from each other. For optimum protection, the best packaging solution is to use such poly material which has both: “Moisture Barrier Properties” as well as “VCI properties”.

“Moisture Barrier Bags” for Corrosion Control

“Moisture Barrier Bags” Do Not Allow Moisture to Enter in the Bags. Thus, “Moisture Barrier Bags” control the environment of the product, inside the Bags. Once the metal product is packed inside the Bag, by sealing it, moisture cannot enter in the bag, thereby giving protection to the metal from the moisture.

Efficiency of “Moisture Barrier Bag” will depend upon the type of material used and its thickness. The “moisture barrier quality” of the material used in manufacturing such bags, is measured by “Moisture Vapor Transmission Rate” which is called “MVTR”.

As long as the bag is intact, and the metal product is placed inside the bag, which is Within a Controlled Humidity Environment, the product will be protected from corrosion for a long time.

“Moisture Barrier Bags” will be effective within the environment of controlled humidity. However, Such Bags may not Protect the Material due to presence of several other chemicals in the atmosphere like acids, salts and sulphur, which causes corrosion.

“Volatile Corrosion Inhibitor Poly Bags” for Corrosion Control

“Volatile Corrosion Inhibitor” is also called as “VCI”. VCI Poly Bags function in totally different way. “Inhibitors” are chemical compounds which Provide an Invisible Barrier Film on the object. In other words, “VCI Chemicals” form a barrier between the corrosive atmosphere inside the bag, and the metal product.

Thus, VCI Poly Bags provide protection against corrosive agents like Moisture, Salty air, Acids, Sulphur and many other Contaminants, by forming a micro layer on the object, which is totally isolated.

In case of “Moisture Barrier Bags”, humidity is not allowed to transmit in the bags. However, “100% Moisture Barrier Material” may be Difficult to Procure.

Ultimate Packaging Solution for Protection from Corrosion

The ultimate packaging solution for long term protection of metal products from corrosion and rust is to Use Poly Bags having both “VCI properties” as well as “Moisture Barrier Properties”.

Sealrust VCI® Mono Layer Poly Bags developed by Modi Poly, is made out of “Low-Density Polyethylene” has blend of “VCI Chemicals” and is manufactured using state-of-art technology. Sealrust VCI® Bags have Better Moisture Barrier Properties, compared to other similar Bags available in market.

Sealrust VCI® Poly Packaging Products, are available in standard and custom sizes, thickness & colours.

Please Click the Link -> Range & Specifications to get details of availability of Sealrust VCI® Anti-Corrosion Poly Products manufactured by Modi Poly.

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