Duralac ANTI-CORROSIVE JOINTING COMPOUND is a chromate containing jointing compound designed to inhibit electrolytic decomposition between
dissimilar metals – often called galvanic corrosion.It is a single pack, air setting product. Used correctly,
Duralac prevents anodic decomposition.
Duralac ANTI-CORROSIVE JOINTING COMPOUND是一种含铬酸盐的接头密封膏，主要用于金属接头密封，可以防止不同金属之间的电化学腐蚀（阳极腐蚀）。
Duralac is a free flowing paste based on a syntheticelastic resin and barium chromate. Duralac conforms to
specification DTD 369B, which superseded DTD 369A.
Duralac has low solubility in water and will not erodewith time, even when subjected to high pressure from
considerable water flow. Duralac enjoys excellentadhesion properties to most substrates and because
of its tough flexible composition, has very low waterabsorption. Duralac has a two year shelf life from the
date of despatch when stored below 20°C. Once acontainer is opened, the remaining Duralac will form a skin.
Duralac is indispensable for the sealing of joints betweendissimilar metals of all types, including magnesium and
its alloys. Consideration should also be given to galvaniccorrosion of the same metal where the electrolyte varies
in concentration forming a concentration cell. Duralachas excellent protection properties for metals in contact
with wood, synthetic resin composition, leather, rubber,fabrics etc. When components of a structure are of
different materials, it is essential the ‘points or faces’ of contact be treated with Duralac to inhibit corrosion in the
presence of an electrolyte where considerable differencesin potential arise. Components of the same metal in
contact with one another under different stresses will also
benefit from the use of Duralac to inhibit corrosion.
For example Duralac may be used:
•Between aluminium alloy plates, extrusions and bolts
or rivets used in building applications.
•In general engineering applications where dissimilar
contact cannot be avoided.
•In vehicle building where aluminium alloy
•For marine application where corrosion is accelerated
by brine concentration.
•In close proximity to the sea where a salt laden
atmosphere will meet with structures and set up
•In aerospace where rivets/bolts are secured into