1515Flashings 15Flasings
Flashing
Advisory:
Galvanic Corrosion
Galvanic Corrosion is an often
overlooked problem. If two metals
are in contact with each other with
an electrolyte present, then the
metal which is less noble, or more
anodic, will start to corrode.
Galvanic Scale
The Galvanic Scale shows how
metals rate. Metals that are
more electropositive, or anodic,
“less noble” and will corrode more
easily are at one end and the metals
that are more electronegative, or
cathodic, “more noble” and are
more resistant to corroding are at
the other end.
Aluminum
Galvanized
Stainless Steel (Standard)
Stainless Steel (Marine Grade)
YorkShield 106 PT
Vinyl / PVC
SBS Modified **
*Deck life expentency of 25 years
**Cross laminated asphalt based products like Ice or Water Shields
0 5 10 15 20 25
Flashing Life Expectancy In Years
GALVANIC SCALE
*Active Stainless Steel is stainless steel that hasn’t been chemically cleaned.
Zinc Stainless Steel
Aluminum 304 & 316
Galvanized Steel (Passive)
Cadmium Copper
Mild Steel, Wrought Iron
Cast Iron Brass, Bronze
Stainless Steel 304 & 316 (Active)*
Lead-Tin Solder Lead
LESS NOBLE MORE NOBLE
15Flashings