DB44/T 1599-2015 English PDF (DB44T1599-2015)

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DB44/T 1599-2015: Water-based coating for container
DB44/T 1599-2015
LOCAL STANDARD OF GUANGDONG PROVINCE
ICS 87.040
G 51
Record No.: 48805-2016
Water-Based Coatings for Container
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ISSUED ON: MAY 25, 2015
IMPLEMENTED ON: AUGUST 25, 2015
Issued by: Guangdong Provincial Bureau of Quality and Technical Supervision
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 6
4 Product Classification ... 6
5 Requirements ... 7
6 Test Methods ... 9
7 Inspection Rules ... 15
8 Quality Assurance ... 16
9 Marking, Packaging and Storage ... 17
Water-Based Coatings for Container
1 Scope
This Standard specifies the product classification, requirements, test methods, inspection rules,
marking, packaging and storage requirements of water-based coatings for steel general
containers and their supporting systems.
This Standard applies to water-based coatings and their supporting systems for protecting and
decorating the surface of general-purpose container steel structures. It includes two or more
layers of coating film inside and outside the container, and floor primer and topcoat inside the
container.
2 Normative References
The following documents are essential to the application of this document. For the dated
documents, only the versions with the dates indicated are applicable to this document; for the
undated documents, only the latest version (including all the amendments) is applicable to this
document.
GB/T 1725 Paints Varnishes and Plastics - Determination of Non-Volatile-Matter Content
(ISO 3251, IDT)
GB/T 1728-1979 Methods of Test for Drying Time of Coatings of Paints and Putties
GB/T 1766 Paints and Varnishes-Rating Schemes of Degradation of Coats
GB/T 1768-2006 Method of Test for Abrasion Resistance of Paint Films (ISO 7784-2, IDT)
GB/T 1771-2007 Paints and Varnishes - Determination of Resistance to Neutral Salt Spray
(Fog) (ISO 7253, IDT)
GB/T 1865-2009 Paints and Varnishes - Artificial Weathering and Exposure to Artificial
Radiation - Exposure to Filtered Xenon-Arc Radiation (ISO 11341, IDT)
GB/T 3186 Paints Varnishes and Raw Materials for Paints and Varnishes ?€? Sampling (ISO
15528, IDT)
GB/T 4893.1-2005 Furniture - Assessment of Surface Resistance to Cold Liquids
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 6739 Paints and Varnishes - Determination of Film Hardness by Pencil Test (ISO
ISO 4628-3:2003 Paints and Varnishes ?€? Evaluation of Degradation of Coatings ?€?
Designation of Quantity and Size of Defects, and of Intensity of Uniform Changes in
Appearance ?€? Part 3: Assessment of Degree of Rusting
ISO 4628-6:2011 Paints and Varnishes ?€? Evaluation of Degradation of Coatings ?€?
Designation of Quantity and Size of Defects, and of Intensity of Uniform Changes in
Appearance ?€? Part 6: Assessment of Degree of Chalking by Tape Method
ISO 9514:2005 Paints and Varnishes ?€? Determination of the Pot Life of Multicomponent
Coating Systems ?€? Preparation and Conditioning of Samples and Guidelines for Testing
ASTM D520-00 (2011) Standard Specification for Zinc Dust Pigment
ASTM D610-08 (2012) Standard Test Method for Evaluating Degree of Rusting on
Painted Steel Surfaces
ASTM D714-02(2009) Standard Test Method for Evaluating Degree of Blistering of Paints
ASTM D1642-03 (2009) Standard Test Methods for Drying, Curing, or Film Formation of
Organic Coatings at Room Temperature
ASTM D1654-08 Standard Test Method for Evaluation of Painted or Coated Specimens
Subjected to Corrosive Environments
ASTM D 6580-00 (2009) Standard Test Method for the Determination of Metallic Zinc in
Both Zinc Dust Pigment and in Cured Films of Zinc-Rich Coatings
3 Terms and Definitions
For the purposes of this Standard, the following terms and definitions apply.
3.1 Water-based coatings
Coatings that take water as solvent or dispersion medium.
4 Product Classification
4.1 The water-based coatings for container in this Standard are divided into the following
categories according to their application functions: primer, intermediate paint, interior topcoat,
exterior paint, underframe paint, floor primer and topcoat.
4.2 The supporting system of water-based coatings for container in this Standard are divided
into: exterior supporting coatings, interior supporting coatings, underframe supporting coatings,
and floor supporting coatings.
4.2.1 Exterior supporting coatings
The outer surface of the container is generally coated with a three-layer coating film, including
primer, intermediate paint and exterior paint. The exterior supporting coating can also be a two-
layer matching system of primer and topcoat.
4.2.2 Interior supporting coatings
The inner surface of the container is generally coated with two-layer coating film, including
primer and topcoat.
4.2.3 Underframe supporting coatings
The surface of the container underframe is generally coated with two-layer coating film,
including primer and topcoat.
4.2.4 Floor supporting coatings
The surface of the container floor is generally coated with single-layer or multi-layer coating
film; and can also be coated with two-layer supporting coating film, including primer and
topcoat.
5 Requirements
5.1 The water-based coatings for container shall meet the requirements of Tables 1 and 2.
5.2 Water-based coatings for container and the interior and exterior coating supporting systems
shall meet the requirements of Table 3.
5.3 The limit of harmful substances in water-based coatings for container shall meet the
requirements in Table 4.
6.2.1 Test environment
The specimen conditioning and the test temperature and humidity shall comply with the
provisions of GB/T 9278.
6.2.2 Preparation of test sample plate
6.2.2.1 When the tested product does not indicate the dilution ratio, make the plate after stirring
evenly.
6.2.2.2 When the tested product clearly indicates the dilution ratio, the items that need to be
tested for plate preparation shall be conducted by adding water according to the specified
dilution ratio. If the tested product clearly indicates the dilution ratio range, the intermediate
value shall be taken.
6.2.2.3 For the test plate of water-based coatings for container and their supporting systems, the
used base material of the sample plate shall adopt the steel plate with steel grade of 09CuPCrNi-
A in China or its equivalent standard. The steel plate shall be free of rust, scratches, stains,
discoloration and other surface defects, etc. Before the steel plate is painted, the oil stains shall
be removed, and the surface shall be free of visible grease and dirt before shot blasting. The
steel plate can also be treated by the cleaning and mechanical grinding methods specified in
GB/T 9271-2008. After treatment, the surface cleanliness of the steel plate shall reach Sa2.5,
and the surface roughness shall be 25??m~50??m.
For the test sample plate of water-based floor coatings for container, except that the base
materials of the sample plate with cut-resistance is aluminum plate or glass plate, the base
materials of other items are the floor material used in the container, including eucalyptus, pine,
birch, bamboo and bamboo-wood mixed planks.
By agreement between the two parties, other base materials of sample plate or treatment
methods different from this standard may also be used, but which shall be indicated in the report.
6.2.2.4 For the preparation of single-coating sample plate of water-based coatings for container
and the coating sample plate of coating supporting system, use single or multiple types of
coatings according to the test requirements; and use spraying method, and control the dry film
thickness, respectively: primer (30??5) ??m; intermediate paint (45??5) ??m; interior topcoat (45??5)
??m; exterior topcoat (45??10) ??m; underframe topcoat (95??15) ??m.
For the preparation of coating sample plate of the water-based floor coatings for container,
unless otherwise specified, it shall be made with a single type of coating, that is, prepare the
plate with topcoat or primer, respectively. It can be painted by brushing or spraying, with two
coats, the first coat is (1.0??0.1) g/dm2, and the second coat is applied after an interval of 24h,
and the second coat is (0.8 ??0.1) g/dm2.
After the plate is prepared, it shall be placed under the conditions specified in GB/T 9278 for 7
days then test.
As agreed by both parties, other coating methods or thicknesses different from this standard
shall be indicated in the report.
6.3 Operation method
The used reagents are all analytically pure above, and the used water is all Class-III water in
accordance with GB/T 6682. The test solution shall be adjusted to the specified test temperature
before the test.
6.3.1 State in the container
Open the coating packaging container and allow sedimentation at the bottom of the container
when stirring with a spatula or stirring rod. It is regarded as uniform if there is no hard block
after stirring.
6.3.2 Appearance of coating film
The prepared sample plate was placed for 24h, visually observe the coating film under scattered
sunlight. If the coating film was uniform, flat, without blooming, pinholes, cracking and falling
off, it was rated as "normal".
6.3.3 Storage stability
Put about 0.5L of coating sample into a well-sealed tin can with about 10% space left in the
can; put it in a constant temperature drying oven at (50??2)??? after sealing; and take it out after
7 days, and place it at (23??2) ??? for 3h. Open the container; stir with a spatula or a stirring rod;
and allow sedimentation at the bottom of the container. If it is easy to mix evenly after stirring,
and the coating has no obvious color or other difference after storage, it is rated as "no
abnormality".
6.3.4 Color of coating film
It shall be carried out according to the provisions of GB/T 11186.2-1989.
6.3.5 Fineness
According to the provisions of GB/T 6753.1, the double-component needs to be mixed before
testing.
6.3.6 Content of non-volatile matter
It shall be carried out according to the provisions of GB/T 1725.
6.3.7 Volume fraction of non-volatile matter
It shall be carried out according to the provisions of GB/T 9272.
6.3.8 Repaint interval time
Surface drying and hard drying shall be carried out according to the provisions of Method-B of
surface drying and Method-A of hard drying specified in GB/T 1728-1979, respectively.
6.3.14 Sandability
Use 400# water sandpaper to sand by hand for 20 times. If the coating film is easy to be sanded
to a flat and smooth surface, it is rated as "easy to polish".
6.3.15 Hardness
It shall be carried out according to the provisions of GB/T 6739. The pencil is a Chinese brand
101 drawing pencil.
6.3.16 Cut resistance
It shall be carried out according to the provisions of GB/T 1768-2006. The floor coating uses
CS-10 rubber grinding wheel, the load is 750g, and the number of revolutions is 500. The
coating of the coating supporting system uses a CS-10 rubber grinding wheel, the load is
250g??2, and the number of revolutions is 1000.
6.3.17 Water resistance
It shall be carried out according to the provisions of GB/T 4893.1-2005. The test solution is
distilled water. The middle part of each plate is taken as the test area, and 5 layers of paper are
placed on each test area. The filter paper shall be kept moist during the test. If necessary, apply
Vaseline to the contact part between the glass cover and the test plate for sealing. After 24h,
remove the filter paper; dry it; and visually observe after placing it under scattered light for 2h.
If 2 of the 3 test plates do not have any morbid phenomena of the coating film such as blistering,
cracking, peeling, etc., and slight discoloration and gloss changes are allowed, then it is rated
as "no abnormality". If the above morbid phenomena of coating film appear, they shall be
described according to the provisions of GB/T 1766.
6.3.18 Alkali resistance
The test and result evaluation method are the same as the water resistance. The test solution is
50g/L NaHCO3 aqueous solution. The test time is 1h. After the test, it is placed for 1h and then
observed.
6.3.19 Alcohol resistance
The test and result evaluation method are the same as the water resistance. The test solution is
50% (volume fraction) ethanol aqueous solution; the test time is 1h. and it is placed for 1h and
then observed.
6.3.20 Salt spray resistance of coating supporting system
The salt spray test shall be carried out according to the provisions of GB/T 1771-2007; and the
test time is 600h. The rust grade is evaluated according to the provisions of ASTM D610-08
(2012); and the blistering grade is evaluated according to the provisions of ASTM D714-02
(2009); and the coating boundary corrosion grade is evaluated according to the provisions of
ASTM D1654-08.
6.3.21 Artificial aging resistance of coating supporting system
It shall be carried out according to the provisions of GB/T 1865-2009; the test time is 600h.
After the test plate is taken out, there shall be no morbid phenomena of the coating film such
as blistering, cracking, peeling, and powder drop. The color change shall be carried out
according to the provisions of GB/T 11186.2-1989; and the chalking level rating shall be carried
out according to the provisions of ISO 4628-6:2011.
6.3.22 Adhesion of coating supporting system
The salt spray resistance shall be carried out according to the provisions of GB/T 1771-2007;
and the test time is 600h. The artificial aging resistance shall be carried out according to the
provisions of GB/T 1865-2009; and the test time is 600h. The adhesion before and after aging
shall be measured according to the provisions of GB/T 9286.
6.3.23 Impact resistance of coating supporting system
According to the provisions of GB/T 20624.2, the impact resistance of the front and reverse
sides of the test plate, and the front and reverse sides of the test pate before and after aging shall
be measured. The salt spray resistance shall be carried out according to the provisions of G...