Applying Medium Oil Alkyd Primer
PAINT SPECIFICATION NO. 35 – Medium Oil Alkyd Primer (Air Dry/Low Bake) Type I and Type II
1.1 This speciﬁcation covers a French process zinc oxide, and medium oil alkyd primer designed for cold rolled sheet or unrusted hot rolled, blast cleaned structural steel. Recoat or dry-through time is 18 hours. It has good resistance to weathering and rust.
1.2 This paint is suitable for exposures in Environmental Zones 1A (interior, normally dry) and 1B (exterior, normally dry). It is intended for brush, roller, or spray application over new or unrusted steel surfaces prepared in accordance with SSPC-SP 6, “Commercial Blast Cleaning,” or SSPC-SP 11, “Power Tool Cleaning to Bare Metal,” or better (See Note 9.1). This primer is to be applied in accordance with SSPC-PA 1, “Shop, Field, and Maintenance Painting of Steel.” If the primed steel is to be exposed to the weather, it should be topcoated as soon as practical.
2.1 This alkyd primer speciﬁcation contains provisions to assure performance which is comparable to that customarily expected from paints containing lead and chromates. Type II has a lower percentage of volatile organic compounds (VOC) than Type I. (Details of the composition are given in Table 1 for Type I and in Table 2 for Type II.)
2.2 Type I primer contains approximately 37% by volume of nonvolatile ﬁlm-forming solids (pigment and binder). The theoretical spreading rate for a 25 micrometer (1 mil) dry ﬁlm thickness is 15 square meters/liter (590 square feet/U.S. gallon). Actual spreading rates can be signiﬁcantly lower. On a calculated basis, the VOC is 492 grams per liter (4.1 pounds per gallon).
2.3 Type II primer contains approximately 66% by volume of nonvolatile ﬁlm-forming solids (pigment and binder). The theoretical spreading rate for a 25 micrometer (1 mil) dry ﬁlm thickness is 26 square meters/liter (1058 square feet/U.S. gallon). Actual spreading rates can be signiﬁcantly lower. On a calculated basis, the VOC is 312 grams per liter (2.6 pounds per gallon).
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. Standards marked with an asterisk (*) are referenced only in the Notes, which are not requirements of this speciﬁcation.
3.2 If there is a conﬂict between the requirements of any of the cited referenced standards and this speciﬁcation, the requirements of this speciﬁcation shall prevail.
3.3 SSPC AND JOINT 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
*SP 5/NACE No. 1
White Metal Blast Cleaning
SP 6/NACE No. 3
Commercial Blast Cleaning
*SP 10/NACE No. 2
Near-White Blast Cleaning
Power Tool Cleaning to Bare Metal
Guide for the Disposal of Lead-Contaminated Surface Preparation Debris
3.4 ASTM INTERNATIONAL STANDARDS:
D 79 Speciﬁcation for Zinc Oxide Pigments
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 522 Test Methods for Mandrel Bend Test of Attached Organic Coatings
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 605 Speciﬁcation for Magnesium Silicate Pigment (Talc)
D 607 Speciﬁcation for Wet Ground Mica Pigments
D 1208 Test Methods for Common Properties of-Certain Pigments
D 1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems
D 1296 Test Method for Odor of Volatile Solvents and Diluents
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 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 2371 Test Method for Pigment Content of Solvent-Reducible Paints
D 2448 Test Method for Water-Soluble Salts in Pigments by Measuring the Speciﬁc Resistance of the Leachate of the Pigment
D 2832 Guide for Determining Volatile and Nonvolatile Content of Paint and Related Coatings
D 3278 Test Methods for Flash Point of Liquids by Small-Scale Closed-Cup Apparatus
D 3722 Speciﬁcation for Natural Red and Brown Iron Oxide Pigments
D 3724 Speciﬁcation for Synthetic Brown Iron Oxide Pigment
D 3734 Specification for High-Flash Aromatic Naphthas
D 3925 Practice for Sampling Liquid Paints and Related Pigmented Coatings
D 3951 Practice for Commercial Packaging
D 4400 Test Methods for Sag Resistance of Paints Using a Multinotch Applicator
3.5 FEDERAL SPECIFICATIONS AND STANDARDS:
3.5.1 Standard Speciﬁcations for Ingredients
TT-R-266 Resin, Alkyd: Solutions
3.5.2 Federal Speciﬁcation and Test Method Standard No. 141
Method 3011 Condition in Container
Method 3021.1 (Canceled) Skinning (Partially Fille Container)
Method 4321 Brushing Properties
Method 4331 Spraying Properties
Method 4541 (Canceled) Working Properties and Appearance of Dried Film
3.6 AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) STANDARD:
ANSI Z129.1 Hazardous Industrial Chemicals —Precautionary Labeling
4.1 Ingredients and proportions shall be as speciﬁed in Table 1 for Type I and in Table 2 for Type II.
4.2 The primers 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.
4.3 The primers shall conform to the composition (analysis) requirements of Table 3.
4.4 The resin for Type 2 shall be a medium length oil alkyd designed for low-VOC use. The physical characteristics of the resin shall be as follows:
Type: Pure Drying Alkyd Resin
Volatiles: Manufacturer may select a solvent system
appropriate to meet VOC requirements of the paint.
Viscosity, Gardner/Holdt: U-Z
Color Gardner-Delta, max.: 10
Acid number, solids, max.: 12
Density of solution, avg.: 1020 g/l (8.5 lb/gal)
Flash point, (SFCC), typical, min.: 38°C (100°F)
5.1 The primers for Type I and Type II shall meet the requirements of Tables 3 and 4 and of Sections 5.2 through 5.11.
5.2 ODOR: Shall be normal for the materials permitted (ASTM D 1296).
5.3 COLOR: The color shall be typical of the speciﬁed mixture of zinc oxide and red or brown iron oxide.
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 solvent that was used by the manufacturer in production of the alkyd resin.
5.5 WORKING PROPERTIES: The paint shall be easily applied by brush, roller, or spray when tested in accordance with FED-STD-141, Methods 4321, 4331, and 4541. The paint shall show no streaking, running or sagging during application or while drying.
5.6 CONDITION IN CONTAINER: The paint shall show no thickening, curdling, gelling, or hard caking when tested as speciﬁed in FED-STD-141, Method 3011, after storage for six months from the date of delivery, in a full, tightly covered container, at a temperature of 10-43°C (50-110°F).
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 SALT CONTAMINATION: Content of salt contamination shall have been minimized by the incorporation of only high purity materials. The speciﬁc resistance of the aqueous leachate of the composite of the pigments in required proportions shall be a minimum of 5000 ohm-cm when tested in accordance with ASTM D 2448.
5.9 FLEXIBILITY: After baking 24 hours at 93°C (200°F) the ﬁlm shall show no cracking when suddenly chilled to 0°C (32°F) and bent sharply on itself through 180 degrees over a 6 mm (1/4 inch) mandrel in the time of 1 to 2 seconds as described in ASTM D 522, Method A. The ﬁlm on the bent part of the panel shall show no visible cracking or disbonding.
5.10 CURING: The primers shall dry to handle within 3/4 hour when baked at 121°C (250°F). Upon recoating after curing, no blistering, wrinkling, or other evidence of lifting shall occur.
5.11 WATER RESISTANCE: A 51 µm (2 mil) dry ﬁlm, air dried 96 hours, immersed in deionized water 18 hours at 30°C (86°F) shall show no wrinkling or blistering immediately after removal from water. After a two hour recovery, the ﬁlm shall show only very slight whitening and dulling.
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 legibly marked with the following information:
Name: Medium Oil Alkyd Primer, Air Dry/Low Bake,
Type I (or Type II)
Speciﬁcation: SSPC-Paint 35
Color: Red or Brown Iron Oxide
Date of Manufacturer:
Quantity of Paint in Container:
Information and Warnings as may be required by
Federal and State Laws:
Manufacturer’s Name and Address:
6.4 PACKAGING: Material shall be packaged and labeled in accordance the requirements of ASTM D 3951 unless otherwise speciﬁed.
6.4 DIRECTIONS FOR USE: The following directions for use shall be supplied with each container of paint:
Directions for Use of Medium Oil Alkyd Primer, Air Dry/Low Bake
This paint is intended for use as a primer over blast cleaned steel in atmospheric exposure; on previously corroded steel it will perform better if the steel is blast cleaned and then salts are extracted from corrosion pits on the surface. The steel surfaces shall be prepared in accordance with SSPC-SP 6 or SSPC-SP 11 or better. Salt contamination, oil, and grease shall be removed to the fullest extent practical, as residues of salt contamination, oil, and grease remaining on the surface will result in decreased paint performance.
Mix paint thoroughly before use. If the pigment has settled, pour off most of the liquid. Thoroughly mix the pigment with the remaining liquid, taking care to scrape all the pigment off the bottom of the can. Gradually add the poured-off liquid and mix thoroughly. Mixing may be made easier by transferring contents to a larger container or by pouring the paint to and from another container. Examine bottom of container for unmixed pigment. Screen paint before applying.
The thinning of paint will change the VOC level. For roller, brush, or airless spray application, no thinning should be necessary. A minimum amount of thinning may be necessary for conventional air spray.
Apply by brush or spray to the speciﬁed ﬁlm thickness or, if none is speciﬁed, to at least 50 micrometers (2 mils) dry. The surface to be painted shall be dry; the surface temperature shall be at least 3°C (5°F) above the dew point; and the temperature of the air shall be over 4°C (40°F). Do not paint outdoors in rainy weather or if freezing temperatures are expected before the paint dries.
Allow paint at least 18 hours drying time before recoating. Alternatively, bake at 121°C (250°F) for 45 minutes before handling.
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 Note 9.2). 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 manufacturer’s 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 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 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 degrees of surface preparation SSPC-SP 5 and SSPC-SP 10 are better than SSPC-SP 6 and SSPC-SP 11.
9.2 The procurement documents should establish the responsibility for samples, testing, and any required afﬁ davit certifying full compliance with the speciﬁcation.
9.3 The extraction of chlorides and other anions from corrosion pits in severe corrosivity areas of the structure is recommended.
9.4 Handle wastes in accordance with federal, state and local government regulations. See SSPC Guide 7, “Guide for the Disposal of Lead-Contaminated Surface Preparation Debris.”
PAINT SPECIFICATION NO. 35 – Medium Oil Alkyd Primer (Air Dry/Low Bake) Type I and Type II