Preventing Bi-metal Corrosion
Bi-metal corrosion (also dissimilar-metal, galvanic, electrolytic or battery-type corrosion) occurs if two or more types of metals are connected in an electrically-conductive medium.
A closed loop, composed of two or more metals, containing conductive tap water and electrically-conductive (salty) treatment chemicals is conducive to this type of corrosion.
Dielectric (insulating) unions should always be used to join dissimilar metals.
(Teflon tape on threaded fittings is not an insulated junction!)
SLS (sodium lauryl sarcosinate) molecules are bipolar (oppositely-charged ends) and dielectric (insulating). One end of the molecule is attracted to and adheres to the metal surface, insulating it, thus slowing corrosion.
Maintain 200 to 300 ppm.
for your information
log templates
SLS, a bi-metal corrosion inhibitor
L-30, 30% sodium lauryl sarcosinate
$0.91/lb. in 450-lb. drums, 15 drum minimum
Hampshire Chemical Co.
800 541-0534
SLS test kit
$350
Hampshire Chemical Co.
800 541-0534