SSPC-Paint-27-2004 基础锌铬酸酯乙烯丁醇洗底漆

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SSPC-Paint 27

November 1, 1982

Editorial Revisions November 1, 2004

SSPC: The Society for Protective Coatings

PAINT SPECIFICATION NO. 27

Basic Zinc Chromate-Vinyl Butyral Wash Primer1

1. Scope

1.1 This specication covers a two-component basic zinc

chromate-vinyl butyral wash primer for structural steel surfaces

prior to painting.

1.2 It is intended that this coating be used primarily on

clean steel free of rust and scale or on clean galvanized metal

cleaned according to SSPC-SP 1, “Solvent Cleaning”; but it

may be used, when specied, on steel with very slight amounts

of rust. It is to be applied by brush or spray in accordance

with SSPC-PA 1, “Shop, Field, and Maintenance Painting of

Steel.”

2. Description

2.1 Basic zinc chromate-vinyl butyral wash primer is a

pretreatment for metals which reacts with the metal and at the

same time forms a protective vinyl lm which contains an inhibi-

tive pigment to help prevent rusting. This coating is supplied

as two components which are mixed together just prior to use.

The base contains an alcohol solution of polyvinyl butyral resin

pigmented with basic zinc chromate. The diluent contains an

alcohol solution of phosphoric acid which reacts with the vinyl

resin, the pigment, and the steel. Details of the composition

are given in Federal Specication DoD-P-15328.

2.2 This primer contains approximately 10% by volume

of nonvolatile lm-forming solids (pigment and binder). The

theoretical spreading rate for a 0.5 mil (13 micrometers) dry

film thickness is 320 square feet/U.S. gallon (7.9 square

meters/liter). Actual spreading rates can be signicantly

lower.

3. Referenced Standards

3.1 The standards referenced in this specication are listed

in Sections 3.4 through 3.7 and form a part of this specica-

tion.

3.2 The latest issue, revision, or amendment of the refer-

enced standards in effect on the date of invitation to bid shall

govern unless otherwise specied.

3.3 If there is a conict between the requirements of any

of the cited reference standards and this specication, the

requirements of this specication shall prevail.

3.4 SSPC STANDARDS:

SSPC Guide 13 Guide for the Identication and Use

of Industrial Coating Material in

Computerized Product Databases

PA 1 Shop, Field, and Maintenance

Painting of Steel

SP 1 Solvent Cleaning

3.5 ASTM INTERNATIONAL STANDARD:

D 3925 Practice for Sampling Liquid Paints and

Related Pigmented Coatings

3.6 FEDERAL STANDARD:

DoD-P-15328 Primer (Wash), Pretreatment

(Formula No. 117 for Metals)

3.7 AMERICAN NATIONAL STANDARDS INSTITUTE

(ANSI) STANDARD.

Z129.1 Hazardous Industrial Chemicals—

Precautionary Labeling

4. Composition

4.1 Ingredients, proportions, and analysis shall be as

specied in Federal Specication DoD-P-15328.

5. Properties

5.1 The paint shall meet the requirements of Federal

Specication DoD-P-15328.

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 of

each component shall be legibly marked with the following

information:

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

and disposing of these materials.

SSPC-Paint 27

November 1, 1982

Editorial Revisions November 1, 2004

Name: Basic Zinc Chromate-Vinyl Butyral Wash Primer

Specication: SSPC-Paint 27

Component:

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 use

shall be supplied with each container of paint:

Directions for Use of Basic Zinc Chromate-Vinyl

Butyral Wash Primer

This paint is intended to be used primarily on clean steel

free of rust and scale or on clean galvanized metal; but it may

be used, when specied, on steel with very slight amounts of

rust bloom.

Four volumes of base shall be mixed with one volume of

diluent as follows: rst, break up the pigment settled in the base

with a wooden paddle, mechanical stirrer, or mixer, and mix to

distribute the pigment evenly throughout the base. After the base

is thoroughly mixed, slowly pour one volume of the diluent into

four volumes of the base with constant agitation. Do not pour

off the liquid which has separated from the pigment and then

add the diluent to the settled pigment to aid mixing. Material

which is not mixed properly may gel and be unt for use. The

base shall be mixed with the diluent in quantities which will

be applied within six to eight hours after mixing. Primer that

cannot be used within a maximum of eight hours after mixing

with diluent shall be discarded and not used. Screen paint

before applying.

Apply the wash primer by spraying or brushing. Spray-

ing is generally the preferred method, but brushing may be

desirable over rough or poorly prepared steel. Roller coating

may be used only if specied. Paint brushes should be clean

and dry, or wetted with alcoholic solvents. When sprayed,

the primer must be deposited on the surface wet; if dusting is

encountered, move the gun closer to the surface; if already

within six inches (15 cm) of the surface, decrease atomizing

air pressure or increase the liquid pressure, or add thinner.

Where thinning is desired isopropanol (99% grade) or

butanol (normal butyl alcohol) or denatured ethanol should

be used. At least 25% thinning is usually necessary to get a

uniform application. Use denatured ethyl or isopropyl alcohol

to clean equipment.

Apply to a dried lm thickness of 0.3 to 0.5 mils (8 to 13

micrometers) dry or approximately 3 to 5 mils (75 to 125 mi-

crometers) wet. Note that at this thickness, which should not

be exceeded, the base metal will show through the coating as

evidenced by uneven coloring. This is the normal appearance;

do not attempt to hide the base metal completely.

When spot treating, cover only spots free of old paint. Slight

overlap of existing paints is generally not harmful provided

adherence of the wash primer to the old paint is satisfactory

and the old paint is not lifted.

The next coat of paint may be applied as soon as the

wash primer is dry, usually from one half hour to four hours

later, except when otherwise authorized by the inspector.

This wash primer should be applied over clean, dry steel;

however, a slightly damp surface may be painted over,

provided adequate normal butyl alcohol is used in the thinner.

If the surface is excessively wet, the vinyl butyral resin will be

thrown out of solution and form a gel, or the dried lm will turn

white, become brittle, and lack adhesion to the steel.

This wash primer is not intended for use as a shop coat

for steel, and it should be recoated with the prime coat of paint

before exposure, preferably within 24 hours.

7. Inspection

7.1 All materials (coatings) supplied under this specica-

tion 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 specication (see Note 9.1). In case of dispute, un-

less otherwise specied, 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 manufac-

turer’s name and identication 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 specied, 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 specications 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 specied herein,

or of the specication or standard itself.

8.2 This specication does not attempt to address problems

concerning safety associated with its use. The user of this

specication, 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.

SSPC-Paint 27

November 1, 1982

Editorial Revisions November 1, 2004

9. Notes

Notes are not requirements of this specication.

9.1 The procurement documents should establish the

responsibility for samples, testing, and any required afdavit

certifying full compliance with the specication.

9.2 This wash primer is intended for use over clean, dry,

descaled steel. It does not work over phosphate treated steel,

and should not be used over paint or wetting oils. It must be

used on bare metal for best results. If used over mill scale, it

may contribute to mill scale lifting.

9.3 This wash primer may be used to bond conventional

paints to galvanized surfaces or stainless steel. Solvent cleaning

of such surfaces, even though apparently clean, is advisable

before applying the wash primer. Adhesion to some types of

white rust preventives on galvanized steel is poor.

9.4 Almost all paints will adhere well to this wash primer;

exceptions are certain types of vinyl paints and some lacquers.

These coatings may require an intermediate or bonding coat.

Paints containing alcohol or ketone solvents generally show

best bonding.

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摘要：

SSPC-Paint-27-2004 是一项由美国防护涂料协会（SSPC）制定的标准规范，专门针对基础锌铬酸酯乙烯丁醇洗底漆的配方、性能要求及应用指南。该底漆以乙烯丁醇树脂为基料，并加入锌铬酸酯作为缓蚀颜料，适用于金属表面的临时防锈与重涂前的底层处理，尤其适用于钢结构及船舶等恶劣环境下的防腐蚀涂层系统。该标准详细规定了漆膜的干燥时间、附着力、耐盐雾及施工条件等关键参数，确保产品在不同气候条件下均能提供可靠的防锈性能。对于涂装工程师、采购及质量控制人员而言，SSPC-Paint-27-2004 是

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