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Aluminium based rust inhibitor and corrosion cure protective coating

Rust Bullet Australasia

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Email: info@rustbullet.com.au

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You are here: Home / Technical / SSPC: The Society for Protective Coatings / Painting Systems / Guide for Selecting Alkyd Painting Systems

Guide for Selecting Alkyd Painting Systems

Rust Bullet

The Best Alkyd Painting Systems

PAINTING SYSTEM GUIDE NO. 2.00 – Guide for Selecting Alkyd Painting Systems

Combinations of surface preparation, primers, intermedi­ates, and topcoats may be selected for special situations for alkyd painting systems using the following Guide. To do so, select the desired surface preparation, primer, intermediate(s), and topcoat from those listed herein and insert them into the standard SSPC Painting System format. In order to aid in the selection, short comments are given. For additional informa­tion consult the “Commentary on Painting Systems” and the referenced standards.

1. Scope

1.1 These specifications cover alkyd painting systems for commercial blast cleaned or pickled steel.

1.2 These systems are suitable for use on parts or struc­tures exposed in Environmental Zones 1A (interior, normally dry) and 1B (exterior, normally dry).

1.3 The color of the finish paint must be specified.

2. Description

2.1 This guide outlines the components of a complete alkyd painting system. A painting system shall consist of sur­face preparation by commercial blast cleaning or pickling, one coat of alkyd primer, one or two intermediate coat(s), and one finish coat.

3. Referenced Standards

3.1 SSPC STANDARDS AND JOINT STANDARDS:

PA 1  Shop, Field, and Maintenance Painting of Steel
PA 2  Measurement of Dry Coating Thickness With Magnetic Gages
PA Guide 4  Guide to Maintenance Repainting with Oil Base or Alkyd Painting Systems
Paint 11*  Red Iron, Zinc Chromate, Raw Lin seed Oil and Alkyd Primer
Paint 21     White or Colored Silicone Alkyd Paint
Paint 25     Red Iron Oxide, Zinc Oxide, Raw Lin seed Oil, and Alkyd Primer
Paint 101  Aluminum Alkyd Paint
Paint 102  Black Alkyd Paint
Paint 103  Black Phenolic Paint
Paint 104  White or Tinted Alkyd Paint
Paint 108  High-Build Thixotropic Leafing Aluminum Paint
SP 2  Hand Tool Cleaning
SP 3  Power Tool Cleaning
SP 5/NACE No. 1  White Metal Blast Cleaning
SP 6/NACE No. 3  Commercial Blast Cleaning
SP 8  Pickling
SP 10/NACE No. 2     Near-White Blast Cleaning

3.2 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) STANDARD:
D 3925  Standard Practice for Sampling Liquid Paints and Related Pigmented Coatings

3.5 FEDERAL SPECIFICATIONS AND STANDARDS:

TT-E-489  Enamel, Alkyd, Gloss (Low VOC  Content)
TT-E-527  Enamel, Alkyd, Lusterless (Low VOC Content) [Cancelled]
TT-E-529  Enamel, Alkyd, Semi-Gloss (Low VOC Content) [Cancelled]
TT-P-645B  Primer Paint, Zinc Molybdate, Alkyd Type (Formerly Zinc Chromate)

3.3 AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS (AASHTO):
M 69  Aluminum Paint

4. Surface Preparation

4.1 SSPC-SP 6, “Commercial Blast Cleaning,” or SSPC­SP 8, “Pickling.” If specified in the procurement documents, better degrees of blast cleaning shall be substituted (SSPC-SP 5 or 10).

COMMENT: Blast cleaning or pickling of the steel is the minimum recommended surface preparation for new work. Better degrees of blast cleaning (SSPC-SP 5 or 10) may be substituted. These methods are more thorough, and the better cleaning they provide may be more economical. In maintenance painting when only small areas need to be cleaned, hand or power tool cleaning (SSPC-SP 2 or 3) may suffice.

1. This paint contains chromate pigments. Users are urged to follow all health, safety, and environmental requirements in applying, handling or disposing of these materials.

5. Paints

5.1 ALKYD PRIMERS: After cleaning, the steel shall be primed with one coat of paint conforming with one of the fol­lowing specifications.

5.1.1 Federal Specifi cation TT-P-645, “Primer, Paint, Zinc Molybdate, Alkyd Type”:
COMMENT: TT-P-645 is pigmented with titanium dioxide and zinc molybdate (older formulations used zinc chromate.) It is particularly useful for alternate dry and wet areas. The vehicle has non-volatile alkyd resin with 23% phthalic anhydride.

5.1.2 SSPC-Paint 11*,”Red Iron Oxide, Zinc Chromate, Raw Linseed Oil and Alkyd Paint”:

5.1.3 SSPC-Paint 25, “Red Iron Oxide, Zinc Oxide, Raw Linseed Oil and Alkyd Primer”:
COMMENT: SSPC-Paint 25 is an iron oxide, zinc oxide primer similar in composition to SSPC Paint 11 except that zinc chromate is replaced with zinc oxide.

5.1.4 Proprietary Primer:

COMMENT: A proprietary primer of proved performance capability may be substituted for any of the above if desired by the specifier. Specify the manufacturer, trade name, and product number of the desired proprietary paint. The paint manufacturer should furnish a typical label analysis.

5.2 INTERMEDIATE COAT(S) FOR ALKYD PAINTING SYSTEMS: The second coat of paint in a three-coat system may be the same as the first coat, but tinted with carbon black or lampblack paste in oil; or when stipulated, it may instead be the same as the finish coat (third coat), but tinted to contrast with the finish coat.
The primers listed above (particularly those of contrasting color) are suitable for intermediate coats. The primer or fi nish coat may also be used as the third coat of a four coat system, provided they are tinted to provide contrast with the preceding and following coats. If an aluminum finish coat is used, the next to last coat may be the same as the last (finish) coat except that the corresponding non-leafing pigment shall be used in place of leafing aluminum.

Alternatively, the intermediate coat(s) of paint shall conform with the following specification.

5.2.1 SSPC-Paint 101,”Aluminum Alkyd Paint,” Type II,
“Non-Leafi ng”: COMMENT: This non-leafing aluminum paint is suitable
for use as an intermediate coat where the final paint coat is to be an aluminum paint and where longer weathering without the prime coat showing through the aluminum finish coat is desired.

5.2.2 Proprietary Intermediate:

COMMENT: A proprietary intermediate of proved perfor­mance capability may be substituted for any of the above if desired by the specifier. Specify the manufacturer, trade name and product number of the desired proprietary paint. The paint manufacturer should furnish a typical label analyst.

5.3 ALUMINUM FINISH COATS: The paint shall conform with one of the following specifications.

5.3.1 SSPC-Paint 101, “Aluminum Alkyd Paint,” Type I “Leafi ng”:

COMMENT: This aluminum alkyd paint has good stability, drying, and application properties as well as excellent durabil­ity in atmospheric exposures. Its lapping properties are fairly good. It is generally mixed on the job by adding two pounds of aluminum paste to one gallon of alkyd varnish vehicle.

5.3.2 SSPC-Paint 108, “High-Build Thixotropic Leafing Aluminum Paint”:
COMMENT: Added protection is possible because of the thicker film which may be applied with this special high build composition.

5.3.3. AASHTO Specifi cation, “Aluminum Paint,” Designation M 69:
COMMENT: This is a ready to mix aluminum finish coat for bridges, and has an oleoresinous tung oil spar varnish vehicle.

5.4 BLACK FINISH COATS: The paint shall conform with one of the following specifications.

5.4.1 SSPC-Paint 102, “Black Alkyd Paint”:

COMMENT:A very durable carbon black and long oil alkyd varnish paint which is recommended for severe exposures such as railroad bridges and industrial atmospheres.

5.4.2 SSPC-Paint 103, “Black Phenolic Paint”:

COMMENT: A carbon black and silica phenolic varnish paint which is suitable for water immersion, high humidity, condensation, industrial atmospheres, or chemical environ­ments.

5.5 WHITE OR TINTED FINISH COATS: If a colored fin­ish coat is specified, the color and shade of color should be agreed upon among the contracting parties, using a suitable method of color designation.

The paint shall conform with one of the following specifi cations.

5.5.1 SSPC-Paint 104, “White or Tinted Alkyd Paint”:

COMMENT:A long oil alkyd paint that has good stability, dry­ing, and application properties as well as excellent durability in atmospheric exposures, particularly industrial atmospheres.

5.5.2 Federal Specification TT-E-489 Class A, “Enamel, Alkyd, Gloss (for Exterior and Interior Surfaces)”:

COMMENT:A series of medium oil, alkyd colored enamels, suitable for interior or exterior use; high gloss but low build per coat; particularly suited for machinery and similar equipment where appearance is important.

5.5.3 Federal Specification TT-E-529 Class A, “Enamel,

Alkyd, Semi-Gloss”: COMMENT: Similar to preceding paint, but semi-gloss.

5.5.4 Federal Specifi cation TT-E-527, “Enamel, Alkyd, Lusterless”:

COMMENT: Similar to preceding two paints, but flat finish.

5.5.5 SSPC-Paint 21, “White or Colored Silicone Alkyd Paint,” Type I, “High Gloss” or Type II, “Medium Gloss”:

COMMENT: Silicone alkyd paints are highly weather resistant and are characterized by excellent color and gloss retention. Twelve colors are described under each type.

5.6 PROPRIETARY FINISH PAINTS:

COMMENT: A proprietary finish of proved performance capability may be substituted for any of the above if desired by the specifier. Specify the manufacturer, trade name, color, and product number of the desired proprietary paint. The manufacturer should furnish a typical label analysis.

6. Paint Application

6.1 PAINT APPLICATION: Follow requirements of SSPC­PA 1, “Shop, Field, and Maintenance Painting of Steel.”

6.2 FIELD TOUCH-UP PAINTING: In accordance with specification SSPC-PA 1, “Shop, Field, and Maintenance Painting of Steel” and in particular with the section thereof entitled “Field Painting.”

6.3 MAINTENANCE PAINTING: The provisions of SSPC­PA Guide 4, “Guide to Maintenance Repainting with Oil Base or Alkyd Painting Systems” should be followed.
COMMENT: This guide covers the steps necessary for repainting previously painted steel surfaces.

6.4 NUMBER OF COATS: A minimum of three.

COMMENT:Three coats are required for usual conditions. Two coats will result in an uneconomically thin paint fi lm, poorer SSPC-PS Guide 2.00 November 1, 1982 Editorial Revisions November 1, 2004 coverage of the blast profile pattern, and shorter life in normal atmospheric exposures. Four coats are recommended in more severe exposures such as near the seashore and areas of high humidity.

6.5 DRY FILM THICKNESS OF PAINT SYSTEM: Not less than the following as measured in accordance with SSPC-PA 2, “Measurement of Dry Coating Thickness with Magnetic Gages”: primer 50 micrometers (2.0 mils); intermediate 38 micrometers (1.5 mils); finish 25 micrometers (1.0 mil); for a three-coat system 115 micrometers (4.5 mils); for a four-coat painting system 150 micrometers (6.0 mils).

7. Inspection

7.1 Unless otherwise specified in the procurement docu­ments, the contractor and the material supplier are respon­sible for quality control to assure that the requirements of this document are met. All work and materials supplied under this guide are also subject to timely inspection by the purchaser or his authorized representative. The contractor or the coat­ing manufacturer should correct such work or replace such material as is found defective under this guide. In case of a dispute, an arbitration or settlement procedure established in the procurement documents (project specification) shall be followed. If no arbitration or settlement procedure is estab­lished, then a procedure mutually agreeable to purchaser, material supplier, and contractor shall be used.

7.2 Samples of paints under this painting system may be requested by the purchaser, and should be supplied upon request along with the manufacturerʼs name and identifica­tion for the materials. Samples may be requested at the time the purchase order is placed. Samples taken at the jobsite should be from previously unopened containers.

7.3 Unless otherwise specified, the methods of sampling and testing should be in accordance with ASTM D 3925.

8. Disclaimer

8.1 While every precaution is taken to ensure that all information furnished in SSPC standards and specifications is as accurate, complete, and useful as possible, SSPC cannot assume responsibility nor incur any obligation resulting from the use of any materials, coatings, or methods specifi ed herein, or of the specification or standard itself.

8.2 This specification does not attempt to address problems concerning safety associated with its use. The user of this painting systems specification, as well as the user of all products or practices described herein, is responsible for instituting appropriate health and safety practices and for insuring compliance with all governmental regulations.

Filed Under: Painting Systems Tagged With: alkyd painting, painting system, painting systems, steel corrosion

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