PLASTAZOTE FOAM: Its Unique Advantages

What is Electrolysis and galvanic corrosion?

Galvanic Corrosion is the corrosion that occurs when two dissimilar metals are used together in a structure and exposed to an electrolyte (salt water, chemical, petrol) and the less noble of the 2 metals will corrode. For example; aluminum sheet with steel fasteners on a boat. Some pairings of metals are more at risk of . Check a galvanic series or chart.

Electrolysis is the acceleration of the galvanic corrosion when electricity is introduced to the metals in question. Connected by an , the less metal experiences accelerated galvanic corrosion.

while both processes involve metals and electrolytes, their dependence on an external voltage source distinguishes them.

PLASTAZOTE foam is made by a unique high-pressure nitrogen gas solution process developed by Zotefoams. The superiority of the Zotefoams' products compared with polyethylene foams made by other technologies stems directly from the use of this high-pressure gas technology, which produces a pure, chemically inert foam without blowing agent residues and with a uniform cell structure with regular cell walls. The process comprises three main stages:

High quality extrusion and cross-linking of solid polymeric sheet.

Impregnation of solid sheet with pure nitrogen gas at elevated temperatures and extremely high pressure.

Final expansion of the impregnated solid sheet.

The separation of the process stages allows accurate control of the individual parameters governing the consistent production of high-quality foams.

Photomicrographs

These photomicrographs show the effect of various manufacturing processes on the cell structure of polyethylene foams. PLASTAZOTE foam shows no sign of residue within its cells, the walls of which are both uniform and regular. It is this regularity that gives Zotefoams' foams their consistent and isotropic mechanical properties. The small-scale local imperfections seen in other foams can seriously reduce mechanical strength (tear, tensile, and compressive), whilst orientation and 'frozen-in' stresses can cause fabrication difficulties.