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GB 9274-1988   Paints and varnishes; Determination of resistance to liquids (English Version)
Standard No.: GB 9274-1988 Status:valid remind me the status change

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Language:English File Format:PDF
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Implemented on:1989-1-1 Delivery: via email in 1 business day
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Standard No.: GB 9274-1988
English Name: Paints and varnishes; Determination of resistance to liquids
Chinese Name: 色漆和清漆 耐液体介质的测定
Chinese Classification: G50    Basic standard and general method for coating
Professional Classification: GB    National Standard
Issued by: National Bureau of Standards
Issued on: 1988-04-19
Implemented on: 1989-1-1
Status: valid
Language: English
File Format: PDF
Word Count: 3000 words
Price(USD): 100.0
Delivery: via email in 1 business day
This standard is an equivalent adoption of international standard "Paints and Varnishes-Determination of Resistance to Liquids" (ISO 2812-1974). 1 Subject Content and Application Scope This standard specifies three test methods for determining the resistance of single coating or multi-coating of paints and varnishes or painting test pieces to the action of liquids, the test methods are immersion method, absorbent medium method and spotting method. The method to be used depends on the particular requirements and coating resistance of the test material. 2 Normative References GB 912 Plain Carbon Structural Steel and Low Alloy Structural Steel Sheets Technical Conditions GB 1727 Methods of Producing Films of Paints, Varnishes, Lacquers and Related Products on Test Panels GB 1764 Methods of Test for Measurement of Dry Film Thickness of Paints GB 2520 Cold-reduced Electrolytic Tinplate GB 3186 Sampling Paint Products GB 3880 Aluminum and Aluminum Alloy Rolled Sheet GB 9271 Paints and Varnishes Standard Panels for Testing 3 Sampling It shall be carried out according to the requirements specified in GB 3186. 4 Test Pieces 4.1 Material and dimension 4.1.1 Test panel Unless otherwise specified or agreed, the test panels shall be tinplate (GB 2520): 50mm×120mm×0.2~0.3mm, steel plate (GB 912), plain carbon cold rolled steel: 50mm×120mm×0.45~0.55mm, aluminum plate (GB 3880 LY12): 50mm×120mm×1~2mm . 4.1.2 Test rod (for immersion method only) One end of each rod shall be rounded to approximate the radius of the rod itself and the other end shall have hole or ring. Unless otherwise specified, the rods shall be of steel or aluminum. Suitable dimensions for the rods are φ15mm×150mm diameter. 4.2 Preparation and coating 4.2.1 Test panel Unless otherwise specified or agreed, the test panels shall be prepared and coated in accordance with those specified in GB 9271. Generally, it is necessary for the back of the panel to be coated with a suitable protective paint or product under test, the edges of the test panel shall be sealed by suitable means. 4.2.2 Test rod Unless otherwise specified or agreed, the test rods shall be prepared and coated in accordance with those specified in GB 1727. 4.2.3 Drying the test pieces The coated test pieces shall be dried (or stoved and placed) for the specified time and, unless otherwise agreed, shall be conditioned at a temperature of 23±2℃ and a relative humidity of 50%±5%. The disposal time shall be in accordance with those specified in product standard or GB 1727. Generally, the minimum time is 16h (except drying paint).4.2.4 Determinate the thickness of coating It shall be determined according to those specified in GB 1764. 5 Test Procedure - Method A (Immersion Method) 5.1 Liquid materials for testing The test liquids shall be those specified in product standard. 5.2 Test temperature The test shall be carried out at a temperature of 23±2℃ unless otherwise specified. 5.3 Test precautions 5.3.1 It is preferable to immerse the test pieces individually in the test liquid, particularly when using liquids of high electrical conductivity in which electrolytic effects could be of some importance. 5.3.2 In certain cases, however, it may be more convenient to immerse several test pieces in a single tank; in these cases, the nature of the test pieces shall be identical and every precaution shall be taken to ensure that the test liquid is unaffected by the test pieces. 5.3.3 The test pieces shall be at least 30mm from the sides of the tank and if several pieces are immersed in the same tank they shall be at least 30mm apart. The test pieces shall be electrically insulated from their supports. 5.4 Procedure A: using a single-phase liquid 5.4.1 Place a sufficient amount of the liquid in a suitable vessel to completely or partially (2/3) immerse the test piece (rod or panel) as specified. Immerse the test piece in an approximately vertical position using suitable supports if necessary. 5.4.2 Cover the container for the duration of the test to minimize the loss of liquid by evaporation or splashing. 5.4.3 If specified, aerate, agitate or circulate the liquid. Aeration shall be carried out by means of a slow stream of air free from oil and grease. If specified, make good any liquid losses by the addition of the test liquid or distilled water at suitable intervals in order to maintain the original volume or concentration. 5.4.4 At the end of the specified immersion period, wash the test piece thoroughly in running water if an aqueous test solution has been used or with a solvent known to be non-injurious to the coating if a non-aqueous test liquid has been used. Remove any residual liquid from the surface by dabbing with a suitable absorbent paper or cloth, and examine the test piece immediately for any signs of deterioration of the coating, if necessary comparing with an identically prepared, but un-immersed, test piece. Examination and comparison shall be repeated after a recovery period if so specified. 5.4.5 If it is required to examine the substrate for signs of attack, remove the coating by the specified method. 5.5 Procedure B: using a two-phase liquid 5.5.1 Insert the coated test piece into a suitable vessel so that it rests by means of suitable supports in an approximately vertical position and, in the case of panels, the broadside is horizontal. 5.5.2 Prepare each of test liquid immediately before use. 5.5.3 Carefully pour the liquid of higher density down the side of the vessel until the test piece (rod or panel) is immersed to a depth of 60mm, unless otherwise specified. Care must be taken not to contaminate the test piece above this level. 5.5.4 Add the second liquid in the same manner until the test piece is immersed totally, unless otherwise specified. Cover the vessel and allow to stand, without agitation. 5.5.5 At the end of the specified immersion period remove the test piece from the test liquids, remove any test liquid from the surface by dabbing with a suitable absorbent paper or cloth, and examine the test piece immediately for any signs of deterioration of the coating in contact with each liquid phase. Compare it if necessary with an identically prepared but un-immersed test piece. Examination and comparison shall be repeated after a recovery period if so specified. 5.5.6 Specimens must not be removed for intermediate examination without subsequent cleaning and repetition of the immersion procedure (see Articles 5.5.1, 5.5.2 and 5.5.3). 5.5.7 If it is required to examine the substrate for signs of attack, remove the coating by the specified method.
1 Subject Content and Application Scope 2 Normative References 3 Sampling 4 Test Pieces 5 Test Procedure - Method A (Immersion Method) 6 Test Procedure - Method B (Using an Absorbent Medium) 7 Test Procedure - Method C (Spotting Method) 8 Test Report Additional Information
Referred in GB 9274-1988:
*GB 912-2008 Hot-rolled sheets and strips of carbon structural steels and high strength low alloy structural steels
*GB 1727-1992 Methods of producing films of paints,varnishes,lacquers and related products on test panels
*GB1764-
*GB2520-
*GB 3186-1982 Sampling paint products
*GB 3880-1997 Aluminium and aluminium alloy rolled sheet
*GB9271-
*QB/T 1133-2017 Jewellery. Determination of gold coatings. Method of spectrometry
*GB/T 5242-2017 Inspection rules and test methods of cemented carbide products
*GB/T 2005-1994 GB/T 2005 -1994 Coke for metallurgy - Determination of coke breeze content and size consist
*GB/T 1996-2017 Coke for metallurgy
*GB/T 10267.1-1988 Method for analysis of calcium metal. The determination of chlorine content by chloride. Selective electrode
*GB/T 4679-2017 Diecasting dies--Components--Specifications
*GB 50222-1995(2001) Code for Fire Prevention in Design of Interior Decoration of Buildings (2001 edition)
*QB/T 5084-2017 Case and bag. Test method of fasteners
*GB 20799-2016 Fresh and frozen meat transport condition
*NB/T 47012-2010(JB/T 4750) Pressure vessels for refrigerant equipment
*GB/T 17425-1998 Purchase and acceptance of couplers and coupler yokes for freight service
GB 9274-1988 is referred in:
undefined*GB/T 23639-2017 Energy conservation and corrosion-resistant steel-made cable support system
*TB/T 2879.2-1998 Railway Rolling Stock - Paint and Painting - Part 2: Methods for Testing Paints
*GB/T 22374-2018 Floor coating
*QC/T 966-2014 Coating technical conditions for automotive plastic parts
*DL/T 627-2018 Room temperature vulcanized sillicon rubber anti-pollution coating for insulators
*HG/T 2454-2006 Solvent-thinned polyurethane coatings(two-component)
*NB/T 31006-2011 Technical code for anticorrosion of offshore wind farm steel structure
*GB/T 31817-2015 Specification of coating for corrosion protection of windpower equipments
*SY/T 0442-2018 Technical standard for internal fusion-bonded epoxy coating of steel pipe
*T/CNCIA 01001-2016 High solid solvent borne automotive coatings
*GB/T 50393-2017 Technical standard for anti一corrosion engineering of steel petroleum storage tanks
*GB/T 2522-2017 Methods of test for the determination of coating insulation resistance and coating adhesion of electrical strip and sheet
*QB/T 5085-2017 Hardware fitting of case and bag. Magnetic buckle
*GB/T 31270.11-2014 Test guidelines on environmental safety assessment for chemical pesticides. Part 11: Silkworm acute toxicity test
*GB/T 31270.17-2014 Test guidelines on environmental safety assessment for chemical pesticides. Part 17: Trichogramma acute toxicity test
*QB/T 2727-2017 Leather. Tests for color fastness. Color fastness to artificial light: xenon art fading lamp test
*GB 1903.14-2016 Food additive. Calcium citrate
*GB/T 34014-2017 Coding regulation for automotive traction battery
*QB/T 5083-2017 Case and bag. Determination of capacity rate
*GB 50193-1993(2010) Code of design for carbon dioxide fire extinguishing systems
*GB 5886-1986 Testing method of single fiber breaking tenacity of ramie
Code of China
Standard
GB 9274-1988  Paints and varnishes; Determination of resistance to liquids (English Version)
Standard No.GB 9274-1988
Statusvalid
LanguageEnglish
File FormatPDF
Word Count3000 words
Price(USD)100.0
Implemented on1989-1-1
Deliveryvia email in 1 business day
Detail of GB 9274-1988
Standard No.
GB 9274-1988
English Name
Paints and varnishes; Determination of resistance to liquids
Chinese Name
色漆和清漆 耐液体介质的测定
Chinese Classification
G50
Professional Classification
GB
ICS Classification
Issued by
National Bureau of Standards
Issued on
1988-04-19
Implemented on
1989-1-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
Language
English
File Format
PDF
Word Count
3000 words
Price(USD)
100.0
Keywords
GB 9274-1988, GB/T 9274-1988, GBT 9274-1988, GB9274-1988, GB 9274, GB9274, GB/T9274-1988, GB/T 9274, GB/T9274, GBT9274-1988, GBT 9274, GBT9274
Introduction of GB 9274-1988
This standard is an equivalent adoption of international standard "Paints and Varnishes-Determination of Resistance to Liquids" (ISO 2812-1974). 1 Subject Content and Application Scope This standard specifies three test methods for determining the resistance of single coating or multi-coating of paints and varnishes or painting test pieces to the action of liquids, the test methods are immersion method, absorbent medium method and spotting method. The method to be used depends on the particular requirements and coating resistance of the test material. 2 Normative References GB 912 Plain Carbon Structural Steel and Low Alloy Structural Steel Sheets Technical Conditions GB 1727 Methods of Producing Films of Paints, Varnishes, Lacquers and Related Products on Test Panels GB 1764 Methods of Test for Measurement of Dry Film Thickness of Paints GB 2520 Cold-reduced Electrolytic Tinplate GB 3186 Sampling Paint Products GB 3880 Aluminum and Aluminum Alloy Rolled Sheet GB 9271 Paints and Varnishes Standard Panels for Testing 3 Sampling It shall be carried out according to the requirements specified in GB 3186. 4 Test Pieces 4.1 Material and dimension 4.1.1 Test panel Unless otherwise specified or agreed, the test panels shall be tinplate (GB 2520): 50mm×120mm×0.2~0.3mm, steel plate (GB 912), plain carbon cold rolled steel: 50mm×120mm×0.45~0.55mm, aluminum plate (GB 3880 LY12): 50mm×120mm×1~2mm . 4.1.2 Test rod (for immersion method only) One end of each rod shall be rounded to approximate the radius of the rod itself and the other end shall have hole or ring. Unless otherwise specified, the rods shall be of steel or aluminum. Suitable dimensions for the rods are φ15mm×150mm diameter. 4.2 Preparation and coating 4.2.1 Test panel Unless otherwise specified or agreed, the test panels shall be prepared and coated in accordance with those specified in GB 9271. Generally, it is necessary for the back of the panel to be coated with a suitable protective paint or product under test, the edges of the test panel shall be sealed by suitable means. 4.2.2 Test rod Unless otherwise specified or agreed, the test rods shall be prepared and coated in accordance with those specified in GB 1727. 4.2.3 Drying the test pieces The coated test pieces shall be dried (or stoved and placed) for the specified time and, unless otherwise agreed, shall be conditioned at a temperature of 23±2℃ and a relative humidity of 50%±5%. The disposal time shall be in accordance with those specified in product standard or GB 1727. Generally, the minimum time is 16h (except drying paint).4.2.4 Determinate the thickness of coating It shall be determined according to those specified in GB 1764. 5 Test Procedure - Method A (Immersion Method) 5.1 Liquid materials for testing The test liquids shall be those specified in product standard. 5.2 Test temperature The test shall be carried out at a temperature of 23±2℃ unless otherwise specified. 5.3 Test precautions 5.3.1 It is preferable to immerse the test pieces individually in the test liquid, particularly when using liquids of high electrical conductivity in which electrolytic effects could be of some importance. 5.3.2 In certain cases, however, it may be more convenient to immerse several test pieces in a single tank; in these cases, the nature of the test pieces shall be identical and every precaution shall be taken to ensure that the test liquid is unaffected by the test pieces. 5.3.3 The test pieces shall be at least 30mm from the sides of the tank and if several pieces are immersed in the same tank they shall be at least 30mm apart. The test pieces shall be electrically insulated from their supports. 5.4 Procedure A: using a single-phase liquid 5.4.1 Place a sufficient amount of the liquid in a suitable vessel to completely or partially (2/3) immerse the test piece (rod or panel) as specified. Immerse the test piece in an approximately vertical position using suitable supports if necessary. 5.4.2 Cover the container for the duration of the test to minimize the loss of liquid by evaporation or splashing. 5.4.3 If specified, aerate, agitate or circulate the liquid. Aeration shall be carried out by means of a slow stream of air free from oil and grease. If specified, make good any liquid losses by the addition of the test liquid or distilled water at suitable intervals in order to maintain the original volume or concentration. 5.4.4 At the end of the specified immersion period, wash the test piece thoroughly in running water if an aqueous test solution has been used or with a solvent known to be non-injurious to the coating if a non-aqueous test liquid has been used. Remove any residual liquid from the surface by dabbing with a suitable absorbent paper or cloth, and examine the test piece immediately for any signs of deterioration of the coating, if necessary comparing with an identically prepared, but un-immersed, test piece. Examination and comparison shall be repeated after a recovery period if so specified. 5.4.5 If it is required to examine the substrate for signs of attack, remove the coating by the specified method. 5.5 Procedure B: using a two-phase liquid 5.5.1 Insert the coated test piece into a suitable vessel so that it rests by means of suitable supports in an approximately vertical position and, in the case of panels, the broadside is horizontal. 5.5.2 Prepare each of test liquid immediately before use. 5.5.3 Carefully pour the liquid of higher density down the side of the vessel until the test piece (rod or panel) is immersed to a depth of 60mm, unless otherwise specified. Care must be taken not to contaminate the test piece above this level. 5.5.4 Add the second liquid in the same manner until the test piece is immersed totally, unless otherwise specified. Cover the vessel and allow to stand, without agitation. 5.5.5 At the end of the specified immersion period remove the test piece from the test liquids, remove any test liquid from the surface by dabbing with a suitable absorbent paper or cloth, and examine the test piece immediately for any signs of deterioration of the coating in contact with each liquid phase. Compare it if necessary with an identically prepared but un-immersed test piece. Examination and comparison shall be repeated after a recovery period if so specified. 5.5.6 Specimens must not be removed for intermediate examination without subsequent cleaning and repetition of the immersion procedure (see Articles 5.5.1, 5.5.2 and 5.5.3). 5.5.7 If it is required to examine the substrate for signs of attack, remove the coating by the specified method.
Contents of GB 9274-1988
1 Subject Content and Application Scope 2 Normative References 3 Sampling 4 Test Pieces 5 Test Procedure - Method A (Immersion Method) 6 Test Procedure - Method B (Using an Absorbent Medium) 7 Test Procedure - Method C (Spotting Method) 8 Test Report Additional Information
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Keywords:
GB 9274-1988, GB/T 9274-1988, GBT 9274-1988, GB9274-1988, GB 9274, GB9274, GB/T9274-1988, GB/T 9274, GB/T9274, GBT9274-1988, GBT 9274, GBT9274