The first generations of waterborne acrylics were introduced in the 1960s, epoxies in 1968 and IOZ alkali silicates already in the 1940s, so these three technologies have existed for many years and are well proven.
An increasing number of real life case histories and results from severe accelerated testing confirm that waterborne coatings match solventborne equivalents in corrosion protection and even surpass solventborne coatings in performance, waterborne acrylics, epoxies and IOZ alkali silicates are in general faster drying and have shorter recoating times than their solventborne equivalents.
Waterborne IOZ alkali silicates: Silicate film formers have been known for over a century and metallic zinc as an anticorrosive pigment for about 150 years.
In 1990, a waterborne high-build high ratio IOZ silicate primer was approved for maintenance on offshore and gas platforms for ESSO in the Bass Strait between South Australia and Tasmania.
IOZ silicates have become the first choice for HD corrosion protection of prepared steel.
The main advantages with waterborne IOZ silicates are of course that they have zero VOCs and therefore contain no health hazardous of flammable solvents.
There are successful application and use of waterborne IOZ silicates with more than 10 years protection on oil rigs in the Gulf of Mexico and in the Bass Strait of the coast of Australia, up to 40 years of protection to date on structural steelwork, railway bridges and road bridges in Australia, more than 20 years protection on oil refinery in Japan and even the Statue of Liberty in New York is internally coated.