Page 49: of Maritime Reporter Magazine (April 15, 1974)

New Hull Coating

Introduced In U.S. By

Hempel Marine Paints

A new marine coating that is water absorbent when applied to a ship's bottom to a thickness of under Yi mil was recently introduced to the

American maritime industry at a press briefing held by Hempel's Ma- rine Paints, Inc. in the St. Regis

Hotel in New York City. Called the Hydron Dynamic System, it is comprised of an antifouling dynamic coating manufactured by Hempel's and a topcoat of Hydron Dynamic manufactured by National Patent

Development Corporation. National

Patent licenses Bausch & Lomb to manufacture and sell soft contact lenses. National Patent's Hydron® is a hydrophilic acrylic polymer non- soluble in water. It is used for non- fogging motorcycle shields, ski and safety goggles, protective building coatings, fishing lures, etc., and has many applications in the medical and dental fields.

The Hydron® Dynamic takes up water, and hull friction is reduced by the water "lubricant" provided by the new material. The manu- facturers claim the new system in- creases the efficiency and life of the antifouling coating, increases ship's speed thereby saving fuel costs, and also prolongs the intervals between drydockings.

Both new products, the antifoul- ing coating and the topcoat, will be marketed by Hempel's Marine

Paints, Inc., with sister companies throughout the world and corporate headquarters in Denmark.

Liquid Carbonic

Brochure Describes

Automatic Pipe Welding

An automatic programmed pipe welding system is described in a new brochure offered by Liquid Car- bonic.

The DynaSurge APW-3D Weld- ing Machine is an integrated auto- matic system used to weld pipe, tube joints and Omega seals in any posi- tion with the pipe, tube or seal fixed at one of both ends. This is ac- complished with a pulsed-arc gas tungsten-arc (TIG) torch mounted on a precision made motor-driven carriage clamped to part of the mem- ber to be welded.

The carriage travels in a 360-de- gree arc around the joint and fuses one of the following: (1) a preplaced consumable insert in single pass welds; (2) consumable inserts, plus cold wire filler metal deposits in multiple pass welds of thick wall pipe; or (3) cold wire filler metal deposits in seal welds.

The system can be used to weld titanium, stainless steel, iconel, cop- per-nickel, monel, carbon steel, and other bimetallic combinations. A standard control console allows pro- gramming for repetitive welding in any position, and skilled welders are not required to operate the equip- ment.

Performance specifications, a com- parison of the APW-3D to manual operations, and complete component equipment are all described in the brochure. For a copy, write Liquid

Carbonic Corporation, subsidiary of

Houston Natural Gas Corporation, 135 South LaSalle Street, Chicago, 111. 60603, attention: H.D. Erzinger

Jr. Ask for Form #6240R.

PORT ENGINEERS HONOR DONAHUE:

Philip Donahue, assistant vice president of

Maritime Overseas Corporation and past president of The Society Of Marine Port

Engineers New York, N.Y., Inc., is shown above receiving a plaque honoring him during the 22nd Annual Fort Schuyler For- um held recently. Joseph Thelgie, president of the Society, made the presentation in recognition of Mr. Donahue's outstanding contributions to the Port Engineers during his term as president, 1972-73. Mr. Dona- hue is a graduate of Kings Point, class of 1944, and is an active member of The

Society of Naval Architects and Marine

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