Page 36: of Marine News Magazine (March 2005)

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applied direct to metal, over any two-pack primer, or as a topcoat where it is effec- tive in hiding imper fections due to the lower gloss level.

The flexibility of Hardtop Flexi has been ascertained using the ASTM 522-93a conical-mandrel test. In this test, coated sheet-metal panels are bent over conical mandrels and the flexibility of the coating determined from the diameters of the mandrels at the points at which any cracking starts. All such tests have con- firmed the exceptional flexibility of

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Sigma Adds to its

Coatings Line

Sigma Coatings added another product to its assortment that already includes

Sigma Phenguard and Sigmaguard CSF.

After use in non-marine applications such as land based storage tanks, Sigma Coat- ings launched the solvent free epoxy phe- nolic tank coating Sigma Novaguard for marine applications. Sigma Novaguard is designed to offer increased chemical resistance, while possessing the same flow and edge coverage properties of the

Sigma solvent free product range.

The solvent free nature of Sigma Nova- guard means that it is more environmen- tally friendly than solvent based products both in terms of VOC emission and health and safety, with the solvent free nature of

Sigma Novaguard improving the working conditions for the applicator as well as reducing the explosion hazard.

Application can be carried out by brush or roller for small areas and cold single feed airless spray for large areas. Sigma

Novaguard can be applied to a dry film thicknesses to 150 microns, enabling a two coat system of total 300 microns to be specified. Previously the minimum appli- cation film thickness for a single coat sol- vent free tank coating was in the order of 300 microns making the cost of coating complex structures, which required two coats to ensure good coverage, was in some cases prohibitive.

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New Coating

Thickness Gage

The PosiTector 6000 gages by DeFel- sko are designed to measure coating thickness on both ferrous and non-ferrous metals, quickly and accurately. Two-but- ton operation and no calibration required for most applications are designed to allow the user to take basic measurements or perform advanced functions easily.

Specialty features including average zero (for rough substrates), automatic substrate recognition, flip display and PA2 capabil- ities.

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Handheld Ultrasonic

Corrosion Gauges

Panametrics-NDT, a business of R/D

Tech Instruments Inc. offers the new

MG2-XT and MG2-DL Ultrasonic Thick- ness gages, primarily designed for inspec- tors and maintenance engineers responsi- ble for measuring the remaining thickness of internally corroded pipes, tanks, and ship hulls.

The gages offer two time-saving fea- tures: Thru-Coat and Echo-to-Echo, both of which eliminate the need to remove a paint or coating. The patented Thru-Coat technology uses a single backwall echo to measure and separately display the thick- ness of the coating and the remaining metal, each adjusted for their correct material sound velocity. The Echo-to-

Echo feature uses multiple backwall echoes to measure true metal thickness.

Each unit is compatible with a complete line of interchangeable dual element transducers that vary in frequencies, diameters, and temperature capabilities.

The splash proof, impact-resistant case with sealed keypad makes these gages durable tools in the harshest conditions.

Circle 50 on Reader Service Card 36 • MarineNews • March, 2005

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