Lab Test - Busting a myth about soundproofing-caused corrosion
The clients of professional soundproofing centers often ask whether it is true or not that beneath the sound absorbing material, the car body metal corrodes. The stereotype that condensed water accumulates beneath the vibration absorbing material leading to metal rusting is very strong among car owners. We’ve conducted an experiment to dispel this myth.
Winter is the most dangerous season for a car. Vehicles are damaged not only by snow and water, but by deicing agents, and the most widespread reagent is sodium chloride, i.e. common salt.
To riddle the opinion about the role of soundproofing in metal rusting, we’ve simulated the winter road conditions: prepared salt brine.
As a test subject, we used a car door and treated it with the sound absorbing material StP Aero. Note that we observed all the installation rules: the metal surface was cleaned and degreased, and the material was pressed thoroughly with a special metal roller. We waited 24 hours for the material to adhere firmly to the surface.
Then we put the door in salt brine. The first signs of corrosion appeared in two hours, and in 24 hours all the untreated surface was covered with rust.
What we had to do was to assess the condition of metal beneath the soundproofing material. We peeled off StP Aero from the surface and saw it for ourselves that there was not a vestige of rust beneath the correctly installed material. Moreover, a material properly pressed with a roller to a clean and degreased surface serves as an anti-corrosion coating and protects the car body against moisture penetration and condensed water accumulation.
Our experiment has proved that it is unreasonable to miss out on acoustic comfort in the car due to corrosion apprehension. The main thing is to use the appropriate high quality materials properly.
And we confirmed the professional level of our Lab yet again!