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You are here: Home / Technical / SSPC: The Society for Protective Coatings / Paints and Coatings / Slow Drying Linseed Oil Black Maintenance Primer (Without Lead and Chromate Pigments)

Slow Drying Linseed Oil Black Maintenance Primer (Without Lead and Chromate Pigments)

Rust Bullet

Black Maintenance Primer Application

PAINT SPECIFICATION NO. 26 – Slow Drying Linseed Oil Black Maintenance Primer (Without Lead and Chromate Pigments)

1. Scope
1.1 This specification covers a very slow drying black, one-coat, raw linseed oil maintenance primer for steel. It has fair rust inhibitive characteristics, good wetting ability, a drying time of about one week, and good resistance to weathering without field coating.

1.2 This primer is suitable for exposures in Environmental Zones 1A (interior, normally dry) and 1B (exterior, normally dry), and is intended for brush and spray application over steel surfaces prepared in accordance with SSPC- SP 2, “Hand Tool Cleaning.” The performance will be improved by a better degree of surface preparation. It is suitable as a maintenance primer and is to be applied in accordance with SSPC-PA 1, “Shop, Field, and Maintenance Painting of Steel.” It is not ever used as a shopcoat for steel because of its very long drying time. It is unsuitable for use where the uncured, slippery paint film would be dangerous to workmen when walking or climbing on painted surfaces.

1.3 This paint specification maintenance primer is based on Patent No. 2,858,285 which was assigned to the DuPont Company in 1959.

2. Description
2.1 The good wetting ability of this primer is the result of its high proportion of raw linseed oil. Details of the composition are given in Table 1.
2.2 This primer contains approximately 87% by volume of nonvolatile film-forming solids (pigment and binder). The theoretical spreading rate for a 4.0 mil (102 micrometers) dry film thickness is 350 square feet/U.S. gallon (8.6 square me-ters/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 referenced standards and this 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 Database


PA 1

Shop, Field, and Maintenance Painting of Steel


SP 2 Hand Tool Cleaning


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 209 Specification for Lampblack Pigment
D 234 Specifi cation for Raw Linseed Oil
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 605 Specification for Magnesium Silicate Pigment (Talc)
D 1208 Test Methods for Common Properties of Certain Pigments
D 1210 Test Methods 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 2369 Test Method for Volatile Content of Coatings
D 2371 Test Method for Pigment Content of Solvent-Reducible Paints
D 2801 (Canceled) Test Method for Leveling Characteristics of Paints by Draw-Down Method (Refer to ASTM D 4400)
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
D 4400 Test Method for Sag Resistance of Paints Using a Multinotch Applicator

SSPC-Paint 26 – November 1, 1982 Editorial Revisions November 1, 2004

TABLE 1 COMPOSITION

TYPICAL REQUIRED INGREDIENTS

Min.

Max.

INGREDIENT STANDARDS FEDERAL

Wt. %

Wt. %

Wt. %

Vol. %

ASTM

PIGMENT: (54 ± 2 wt. %)

Zinc Oxide, French Process

15

17

8.0

—

D 79, Type I

—

Barium Lanolate

3

5

2.7

—

—

—

Magnesium Silicate

—

75

40.5

—

D 605

—

Lampblack

—

5

2.6

—

D 209

—

VEHICLE: (46 ± 2 wt. %)

Raw Linseed Oil

64

—

29.3

—

D 234

—

Alkyd Resin Solids

16

—

7.4

—

—

TT-R-266,

Mineral Spirit Thinner

—

20

9.5

—

D 235 Type II

—

Driers

—

—

—

—

D 600, Class B

—

TOTALS

100.0

3.5 FEDERAL STANDARDS:
3.6.1 Standard Specifications for Ingredients:
TT-R-266 Resin, Alkyd: Solutions
FED-STD-141
Paint, Varnish, Lacquer and Related Ma­terials: Methods of Inspection, Sampling and Testing
Method 3011 Condition in Container
Method 3021.1 (Canceled)Skinning (Partially Filled Container)
Method 4021 (Canceled) Pigment Content (Ordinary Centrifuge) (Use ASTM D 2371)
Method 4053 Nonvolatile Vehicle Content
Method 4061 Drying Time
Method 4203 Reducibility and Dilution Stability
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:
Z129.1 Hazardous Industrial Chemicals— Precautionary Labeling

4. Composition
4.1 Ingredients and proportions shall be as specified in Table 1.
4.2 The primer 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 paint shall conform to the composition (analysis) requirements of Table 2.

5. Properties
5.1 The paint shall meet the requirements of Table 3 and Sections 5.2 through 5.7.
5.2 ODOR: Shall be normal for the materials permitted (ASTM D 1296).
5.3 COLOR: The color shall be typical of the specific mixture of zinc oxide and carbon black.
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, 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 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.

6. Labeling
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: Slow Drying Linseed Oil Black Primer
Specification: SSPC-Paint 26
Color: Black
Lot Number:
Stock Number:
Date of Manufacture:
Quantity of Paint in Container:
Information and Warnings as may be required by
Federal and State Laws:
Manufacturer’s Name and Address:

6.3 DIRECTIONS FOR USE: The following directions for use shall be supplied with each container of paint:

Directions for Use of Slow Drying Linseed Oil Maintenance Primer and Alkyd Primer

This paint is intended for use as a primer over hand cleaned steel in atmospheric exposure; it will perform better if the steel is power tool cleaned, blast cleaned, or pickled. All rust scale, loose rust, loose mill scale, 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.

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.

Thin paint only if necessary, using only mineral spirits. For brush application under normal conditions, no thinning should be necessary. For spray applications, add up to one pint of thinner per gallon (120 ml/L) of paint when necessary.

Apply by brush or spray to the specified film thickness or, if none is specified, to at least 4 mils (100 micrometers) dry or approximately 4.1 mils (104 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 one week drying time in good weather before re-coating.

7. Inspection
7.1 All materials (coatings) supplied under this specifi cation 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 9.1). 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 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. Disclaimer
8.1 While every precaution is taken to ensure that all information furnished in SSPC standards and specifications are 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.

9. Notes
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. 26 – Slow Drying Linseed Oil Black Maintenance Primer (Without Lead and Chromate Pigments)

Filed Under: Paints and Coatings Tagged With: maintenance primer, paint specification, primer coatings, steel corrosion

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