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vessels, barges, drill rigs and work platforms. Basic operation is a beat- ing action by hardened steel fingers and wheels.

The Arnessen line consists of a broad range of chipping hammers powered by a choice of air or electric drives. These are completely por- table units designed for continuous or intermittent use that can be used directly at the work site to clean steel of old paint, epoxy, rust scale and caked-on residue. They can be used on vertical, horizontal or ir- regularly-shaped surfaces, with 15 types of rotating heads available to handle everything from thick to fine residue removal. No special train- ing is required, even for unskilled labor, and a single operator can eas- ily clean over 900 square feet of plate in an eight-hour shift.

Arnessen deck scalers are specifi- cally engineered for heavy duty re- moval of undesirable deposits from large flat areas. These units are available with air, electric or gaso- line power and are built to give years of reliable duty; some 30-year-old machines are still in regular ser- vice. They are easy to maintain, with 44 hardened steel striking wheels that can be quickly replaced when worn.

Additionally, Arnessen has a line of universal needle scalers designed to work in confined spaces and un- even areas.

CARBOLINE

Circle 68 on Reader Service Card

To provide long-term corrosion protection to the mile-long array of interconnected steel platforms and bridges that form the world's larg- est offshore mining development,

Freeport-McMoran Inc. recently se- lected a three-stage coating system supplied by Carboline, St. Louis,

Mo., comprised of a zinc primer with an epoxy mid-coat and a polyure- thane topcoat. The coating was ap- plied to all exposed steel surfaces— from the top of the 340-foot high sulfur-mining production platforms to the mudline, more than 200 feet below the surface of the Gulf of

Mexico. Coating the j ackets down to the mudline, instead of the tradi- tional 10 feet below sea level, is expected to double the length of ca- thodic protection.

Mitch Braun, marketing ser- vices manager for Carboline, said: "Because the steel structures of the huge mining complex will be con- tinually exposed to salt air, seawa- ter and sulfur, Freeport-McMoran needed a tough, durable coating sys- tem that could provide outstanding, long-term corrosion protection. Our

Carbo Zinc 11 primer over-coated with Carboline 890 epoxy and

Carboline 134 polyurethane offered the ideal solution for the tough coat- ing project."

Carbo Zinc 11 is an inorganic zinc primer coat that protects steel gal- vanically to eliminate sub-film cor- rosion.

Carboline 890, based on a high- performance Ciba-Geigy epoxy resin, is a two-component, high-sol- ids, high-build coating.

Carboline 134 polyurethane is a two-component coating designed to produce a glossy, smooth, hard-film surface finish.

CHESAPEAKE SPECIALTY

PRODUCTS

Circle 69 on Reader Service Card

For shipyards and other indus- tries involved in blast cleaning prior to painting, Chesapeake Specialty

Products, Inc., Baltimore, Md., has developed new quality control per- formance standards for recyclable abrasive blasting media such as steel shot or grit.

The new standards proposed by

Chesapeake Specialty Products are based upon performance criteria rather than the generally accepted tests of the SAE, SFSA and ISO standards which measure features of the abrasive product such as mi- crostructure, hardness, cracks and voids. These tests are costly, labor intensive, subjective and not rel- evant to the main purpose of abra- sive blasting which is to clean steel prior to painting.

The real measure of an abrasive is how fast it cleans, type of surface produced and how long it will last.

The advantages of the proposed test are that it meets the three pri- mary criteria noted above and that

A Optional A Optional A High strength, A Full widths to 50' heights to 50' low alloy steel instrumentation in super-structure operator's compartment

A

MODERNIZE YOUR SHIPYARD... Increase Your Boat Handling Capability With

The All New 500 Ton Capacity Marine Travelift Straddle Hoist

Marine Travelift, Inc., the World Leader in the manufacture of Self-Propelled Straddle

Hoists, introduces the largest rubber tired boat hoist in the world.

The Model 500BFM will double or triple your shipyard productivity for handling commercial boats such as tugs, barges, work boats, fishing boats, large pleasure boats or any other type of vessel... also, sections and heavy yard lifts.

The 500BFM lifts 100 ton to 500 ton vessels in and out of the water in minutes instead of hours or days as required with previous boat handling methods.

Handles boats to 200' with beams to 48' and allows greater flexibility over drydocks or elevating platforms and gives you better yard utilization.

For complete information and specifications on the 500BFM or our complete line of mobile boat hoists with capacities from 15 to 500 tons, contact Marine Travelift, Inc.. 49 E. Yew St., Sturgeon Bay WI54235 USA • 414-743-6202 • Telex: LIFTS STGB 260056 • FAX: 414-743-1522. "Over 2000 Units In Service Worldwide!" rnqRing TRRVgLIFTnc

Model 500BFM at Abu Dhabi, United Arab Emirates

Circle 266 on Reader Service Card

A Direct drivX A Planetary gear winches N drives to all wheels

A Adjustable sling spacing

A Extra heavy-duty slings with covers

More •••

A Diesel powered A Automatic load equalizing

A BFM beam forward design

A Hydraulic powered "swing" operator's compartment

A Easy maintenance cat walk to engine and winches

A Cable saving A Stainless steel A Steel belted A Pivot trunnion sheaves hydraulic tubing radial tires

February, 1993 31