CREVICE, SEAM AND FLANGE CORROSION
Applying Goldseal on high-moisture face-to-face joints, stressed or vibration prone joints, or in overlap bolt-through situations significantly increases the longevity of your steel.
Using Goldseal to avoid corrosion
Crevice corrosion often occurs at the seam joint of dissimilar materials. Goldseal is formulated to bridge, penetrate, and encapsulate areas prone to early breakdown. Plus, it can be applied after maintenance to reinforce, repair or replace the coating in localised areas.
Goldseal Cold Spray and IHS can be cold knifed into narrow gaps between steel or wooden members, or can be used to encapsulate imperfect welding repairs, particularly where plate repairs are not welded on all 4 sides. For optimum results, Goldseal Cold Spray or Goldseal IHS should be applied to both faces prior to assembly to produce an immediate seal. When at room temperature, Goldseal IHS is 97% solid, filling large cracks, depressions and holes without sagging. The formula penetrates the joints and creates a self-healing, airtight seal that flexes with significant movement.
Where does corrosion occur?
On folded sheet sections that are bolted together
On heavy steel sections that overlap or are joined by nut and bolt plates (e.g. bridges)
On flat flanges that are bolted to other structural members (e.g. diagonal braces)
On mild steel valves that are joined into pipe lines and require service removal
On overlapped or bolted steel frames that expand, contract, or move with vibration or temperature — especially when painted
On building elements where epoxy cancer has broken out due to impact damage
25 years after the first coat of Goldseal was applied to this expansion joint there is no steel loss or serious signs of corrosion. It is now ready for a re-coat.
“It is my pleasure to give an obligation-free testimonial on this amazing product. I assure you, no new steel building would be built on our site without applying this product. Surely, only people ignorant of Goldseal’s existence would fail to consider its use.”
Applying Goldseal on corroded steel
How it works.
1. Corrosion that develops from contaminants and moisture can expand joints and crevices. If this occurs, flaking should be mechanically removed as much as possible without further damage.
2. Goldseal is applied as a penetrating rust kill primer and oxygen barrier.
3. This is left to soak for 24 hours and replenished as necessary.
4. Goldseal IHS will fill and level the crevice — this produces a moisture, marine, and chemical-proof seal that is durable to sun, wind and rain.
On steel where a bridge deck has been removed for maintenance:
1. The damp proof membrane is removed, the upper beam surface is descaled, and any pitting is cleaned out.
2. The flat surface is coated with Goldseal.
3. All pits are filled to produce a level surface.
4. Damp proof membranes can be replaced — however this is not necessary as Goldseal separates the timber and steel from chemicals used in wood preservation.
Cold Spray can be thinned and applied as a brush spot repair to deeply penetrate crevice corrosion. It’s often used as an interim solution for smaller budgets.
Before
After
Forestry Bridge, Taupo, New Zealand
Industry Examples
Small fittings or damage repairs
Goldseal fills crack damage to concrete, prevent, or terminate spalling. It seals the concrete to steel interface and encapsulates the steel repair with minimal preparation and no abrasive blasting.
Seam corrosion
When a dry film paint is applied to the steel beam, it cannot protect the steel to wood joint. Water and contaminants will quickly invade this crevice and corrosion will undercut the paint coating. Goldseal protects the wood to steel joint for over 20 years and although the coating is dry to the touch, it is pliable and can be removed if necessary.
Foundation protection
Where painted structures are bolted to other substrates — particularly in chemical or damp environments — paint coatings may only last a few years before edge creep corrosion begins or joint movement cracks the paint seal. Goldseal’s formula can be applied in clear or coloured form and remains pliable for decades.
INDUSTRIAL HOT SPRAY
An anti corrosive oil-based barrier coating, designed to soak into your steel and protect against all external elements.
COLD SPRAY
A light, cold solution designed to be applied by your own maintenance teams.
10 YEAR GOLDSEAL GUARANTEE
Minimum guarantee of corrosion protection when our in-house team applies IHS to your steel.