Thixotropic Leaﬁng Aluminum Paint Application
PAINT SPECIFICATION NO. 108 – High-Build Thixotropic Leaﬁng Aluminum Paint
1.1 This speciﬁcation covers a high-build thixotropic leaﬁng aluminum paint primarily intended for the topcoat in a two-coat high-build system, with a thixotropic rust inhibitive primer, or as a one-coat high-build repaint over spot priming.
1.2 This aluminum paint is suitable for exposures in Environmental Zones 1A (interior, normally dry) and 1B (exterior, normally dry) and is intended for brush or spray application over rust inhibitive priming paints, over itself, or over other oleoresinous paints. This paint is suitable as a topcoat and is to be applied in accordance with SSPC-PA1, “Shop, Field, and Maintenance Painting of Steel.”
2.1 High-build thixotropic aluminum paint contains leaﬁng aluminum pigment and a thixotropic long oil alkyd in a single package.Thixotropic paint appears to possess a high viscosity, which is altered because of a reversible gel structure when the paint is agitated. When the paint is stirred, sprayed, brushed, or rolled, the level of viscosity falls rapidly and the paint becomes liqueﬁed. During application, the appearance is similar to other protective coatings. However, the liquid state will not remain for long. If undisturbed, the paint will re-gel within a short time. Details of the composition are given in Table 1.
2.2 This aluminum paint contains approximately 49% by volume of nonvolatile ﬁlm-forming solids (pigment and binder). The theoretical spreading rate for a 3.0 mil (76 micrometers) dry ﬁlm thickness is 260 square feet/U.S. gallon (6.4 square meters/ liter). Actual spreading rates can be signiﬁcantly lower.
3. Referenced Standards
3.1 The latest issue, revision, or amendment of the referenced standards in effect on the date of invitation to bid shall govern unless otherwise speciﬁed.
3.2 If there is a conﬂict between the requirements of any of the cited reference standards and this painting speciﬁcation, the requirements of this speciﬁcation shall prevail.
3.3 SSPC STANDARDS:
SSPC Guide 13
Guide for the Identiﬁcation and Use of Industrial Coating Material in Computerized Product Databases
Shop, Field, and Maintenance Painting of Steel
3.4 ASTM INTERNATIONAL STANDARDS:
D 185 Test Methods for Coarse Particles in Pigments, Pastes, and Paints
D 235 Speciﬁcation for Mineral Spirits (Petroleum Spirits) (Hydrocarbon Dry Cleaning Solvent)
D 562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-type Viscometer
D 600 Speciﬁcation for Liquid Paint Driers
D 962 Speciﬁcation for Aluminum Powder and Paste Pigments for Paints
D 1208 Test Methods for Common Properties of Certain Pigments by Hegman-type Gage
D 1398 Test Method for Fatty Acid Content of Alkyd Resins and Alkyd Resin Solutions
D 1475 Test Method for Density of Liquid Coatings, Inks, and Related Products
D 1542 (Withdrawn) Test Method for Qualitative Detection of Rosin in Varnishes
D 1544 Test Method for Color of Transparent Liquids (Gardner Color Scale)
D 1639 Test Method for Acid Value of Organic Coating Materials
D 1640 Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature
D 2369 Test Method for Volatile Content of Coatings
D 3278 Test Methods for Flash Point of Liquids by Small-Scale Closed-Cup Apparatus
D 3925 Practice for Sampling Liquid Paints and Related Pigmented Coatings
3.5 FEDERAL STANDARDS:
FED-STD-141 Paint, Varnish, Lacquer and Related Materials: Methods of Inspection, Sampling and Testing
Method 3011 Condition in Container
Method 3021 (Canceled)Skinning(Partially Filled Container)
Method 4021 (Canceled) Pigment Content (Ordinary Centrifuge)
Method 4053 Nonvolatile Vehicle Content
Method 4061 Drying Time
Method 4203 Reducibility and Dilution Stability
Method 4321 Brushing Properties
Method 4331 Spraying Properties
Method 4494 (Canceled) Sag Test (Multinotch Blade)
Method 4541 (Canceled) Working Properties and Appearance of Dried Film
3.6 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD:
Z129.1 Hazardous Industrial Chemicals— Precautionary Labeling
4.1 Ingredients and proportions shall be as speciﬁed in Table 1.
4.2 The paint based on the speciﬁed ingredients shall be uniform, stable in storage, and free from grit and coarse particles. No rosin or rosin derivatives may be used. Beneﬁcial additives such as anti-skinning agents, suspending agents, or wetting aids may be added. Leaﬁng aids or stabilizers are also permitted if they do not substantially alter the thixotropy of ﬁlm properties.
4.3 The thixotropic alkyd resin shall conform to the composition (analysis) requirements of Table 2.
4.4 The paint shall conform to the composition (analysis) requirements of Table 3.
5.1 The paint shall meet the requirements of Table 4 and Sections 5.2 through 5.8.
5.2 ODOR: Shall be normal for the materials permitted (ASTM D 1296).
5.3 COLOR: A dried ﬁlm of the paint shall show good leaﬁng as indicated by a bright aluminum surface.
5.4 COMPATIBILITY: There shall be no evidence of incompatibility of any of the ingredients of the paint when two volumes of the paint are slowly mixed with one volume of mineral spirits (FED-STD-141, Method 4203).
5.5 WORKING PROPERTIES: The paint shall be easily applied by all three methods when tested in accordance with FED-STD-141, Methods 4321, 4331, and 4541. The paint shall show no streaking, running, or sagging after drying.
5.6 CONDITION IN CONTAINER: The paint shall show no thickening, gas evolution, curdling, gelling, or hard caking when tested as speciﬁed in FED-STD 141, Method 3011, after storage for 12 months from date of delivery, in a full, tightly covered container, at a temperature of 50-110°F (10-43°C).
5.7 SKINNING: There shall be no skinning in a three-quarters ﬁlled closed container after 48 hours when tested in the standard manner speciﬁed in FED-STD-141, Method 3021.
5.8 FLEXIBILITY: Apply paint with a 1-1 /2″ (4 cm) brush to a 4″ x 12″ (10 cm x 30 cm) 0.032″ (0.8 cm) thick cold-rolled steel panel with the panel horizontal. Apply paint quickly obtaining a wet ﬁlm thickness of 7-10 mils (178- 204 micrometers) on as much of the panel as possible. Final brush stroke shall be in the 12″ (30 cm) direction, air dried for 72 hours at 70-75°F (21-24°C), and baked ﬁve hours at 210°F (99°C). This panel shall show no cracking on the radius of the bend when bent over a 1-1/4″ (3.2 cm) mandrel. The ﬁlm on the bent part shall show satisfactory adhesion.
6.1 Labeling shall conform to ANSI Z129.1.
6.2 Technical data shall be provided for at least all data elements categorized as “essential” in SSPC-Guide 13
6.3 MARKING OF CONTAINERS: Each container shall be legible marked with the following information:
Name: High-Build Thixotropic Leaﬁng Aluminum Paint
Speciﬁcation: SSPC-Paint 108
Aluminum Lot Number:
Date of Manufacture:
Quantity of Paint in Container:
Manufacturer’s Name and Address:
Information and Warnings as may be required by Federal and State Laws:
6.4 DIRECTIONS FOR USE: The following directions for use shall be supplied with each container of paint:
Directions for Use Thixotropic Aluminum Paint
This paint is intended for use as a ﬁnish coat over rust inhibitive primers on structural steel, over itself, or over other oleoresinous paints. It is suitable for outdoor exposure in rural, industrial, and marine environments and for interior use. All oil, grease, dust and loose or non-adherent paint shall be removed. Oil and grease shall be removed to the fullest extent practical, as residues of oil and grease remaining on the surface will result in decreased paint performance. If the undercoat is damaged, the steel shall be spot-cleaned and spot-primed with rust inhibitive primer.
Mix paint thoroughly before use. This thixotropic paint settles only slightly and moderate hand stirring should be sufﬁcient. Thin paint only if necessary, using only mineral spirits with a minimum ﬂash point at 140°F (60°C) and a boiling range of 360-420°F (182-215°C). Under normal conditions, no thinning should be necessary. Add up to one-half pint of thinner per gallon (60 ml/L) of paint when necessary.
Apply by brush or spray to the speciﬁed ﬁlm thickness or, if none is speciﬁed, to at least 3 mils (76 micrometers) dry or approximately 7 mils (178 micrometers) wet. The surface to be painted shall be dry; the surface temperature shall be at least 5°F (3°C) above the dew point, and the temperature of the air shall be over 40°F (4°C). Do not paint outdoors in rainy weather or if freezing temperatures are expected before the paint dries.
Allow paint at least 24 hours drying time in good weather before re-coating.
7.1 All materials (coatings) supplied under this speciﬁcation are subject to timely inspection by the purchaser or his authorized representative. The purchaser shall have the right to reject any materials supplied which are found to be defective under this speciﬁcation (see Note9.1). In case of dispute, unless otherwise speciﬁed, the arbitration or settlement procedure established in the procurement documents shall be followed. If no arbitration or settlement procedure is established, then a procedure mutually agreeable to the purchaser and material supplier shall be used.
7.2 Samples of paints may be requested by the purchaser and shall 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 or may be taken from unopened containers at the job site.
7.3 Unless otherwise speciﬁed, the sampling shall be in accordance with ASTM D 3925.
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 speciﬁed 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 speciﬁcation, as well as the user of all products or practices described herein, is responsible for instituting appropriate health and safety practices and for ensuring compliance with all governmental regulations.
Notes are not requirements of this speciﬁcation.
9.1 The procurement documents should establish the responsibility for samples, testing, and any required afﬁdavit certifying full compliance with the speciﬁcation.
9.2 ASTM and Federal Standard Test Methods listed as “canceled” or “withdrawn” are no longer maintained, but are still available as historical documents.
PAINT SPECIFICATION NO. 108 – High-Build Thixotropic Leaﬁng Aluminum Paint