This standard replaces GB/T16266-1996 "Contact Corrosion Test Methods for Packaging Materials". This standard specifies the test method for corrosion of metal surfaces in close contact with packaging materials. This standard is applicable to contact corrosion tests of packaging materials in close contact with steel and aluminum surfaces. Compared with GB/T16266-1996, the main changes in this standard are as follows: --- Modified the temperature stability parameters of the drying oven; --- Added specific standard requirements for drying ovens; --- Modified the test piece cleaning procedures and cleaning media; --- Added requirements and instructions for the placement method of granules and bagged samples; --- Cancelled the distinction between the pressure surface and the non-pressure surface of the original standard and made modifications; --- Cancelled the evaluation results and changed to determine whether the sample corrodes the test piece surface; --- Added requirements for the description of the observed phenomenon. GB/T 16266-2008 Test methods for packaging materials - contact corrosion GB/T16266-2008 standard download decompression password: www.bzxz.net
This standard replaces GB/T16266-1996 "Test methods for packaging materials - contact corrosion". This standard specifies the test method for corrosion of metal surfaces in close contact with packaging materials. This standard is applicable to contact corrosion tests of packaging materials in close contact with steel and aluminum surfaces. Compared with GB/T16266-1996, the main changes of this standard are as follows: ———The temperature stability parameter of the drying oven has been modified; ———The specific standard requirements for the drying oven have been added; ———The cleaning procedure and cleaning medium of the test piece have been modified; ———The requirements and instructions for the placement method of granules and bagged samples have been added; ———The distinction between the pressure surface and the non-pressure surface of the original standard has been cancelled and modified; ———The evaluation result has been cancelled and replaced by judging whether the sample corrodes the surface of the test piece; ———The requirements for the description of the observed phenomenon have been added.
This standard is equivalent to the method 3005 "Contact Corrosion Test Method for Soft, Hard or Granular Solid Materials" in the US Federal Standard FED-STD-101 "Test Procedure for Packaging Materials".
This standard replaces GB/T16266-1996 "Contact Corrosion Test Method for Packaging Materials".
Compared with GB/T16266-1996, the main changes of this standard are as follows:
--- The temperature stability parameter of the drying oven has been modified;
--- The specific standard requirements for the drying oven have been added;
--- The cleaning procedures and cleaning media of the test pieces have been modified;
--- The requirements and instructions for the placement of granules and bagged test pieces have been added;
--- The distinction between the pressure surface and the non-pressure surface of the original standard has been cancelled and revised;
--- The evaluation results have been cancelled and replaced by judging whether the sample corrodes the surface of the test piece;
--- The requirements for the description of the observed phenomenon have been added.
This standard is proposed and managed by the National Technical Committee for Packaging Standardization.
Drafting units of this standard: General Research Institute of Machinery Science, Shenyang Anti-Rust Packaging Materials Co., Ltd., China Packaging Federation.
The main drafters of this standard are: Liu Hongwen, Zhang Xiaojian, Dou Zhihong, An Chengqiang, Liu Hong, Liu Guojing.
The previous versions of the standards replaced by this standard are:
---GB/T16266-1996.
The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions are applicable to this standard.
GB/T678 Chemical reagent ethanol (anhydrous ethanol) (GB/T678-2000, neqISO6353-2:1983)
GB/T687 Chemical reagent glycerol (glycerol) (GB/T687-1994, neqISO6353-3:1987)
GB/T699 High-quality carbon structural steel
GB/T3880.1 Aluminum and aluminum alloy plates and strips for general industrial use Part 1: General requirements
GB/T5048 Moisture-proof packaging
JB/T5520 Technical conditions for drying ovens

1CS55.020
National Standard of the People's Republic of China
GB/T16266—2008
Replaces GB/T16266—1996
Test method of packaging materials
Contact corrosion
Test method of packaging materials-Contact corrosionPublished on April 1, 2008
Digital anti-counterfeiting
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaAdministration of Standardization of the People's Republic of China
Implementation on October 1, 2008
GB/T 16266—2008
This standard is equivalent to the method 30056 "Contact corrosion test method for soft, hard or granular solid materials" in the Federal Standard FED-STD-101 "Test Procedure for Packaging Materials" of the United States. This standard replaces GB/T16266-1996 "Test method for contact corrosion of packaging materials".
Compared with GB/T16266-1996, the main changes of this standard are as follows: the temperature stability parameter of the drying oven has been modified; the specific standard requirements for the drying oven have been added; the test piece decontamination and cleaning procedures and cleaning media have been modified; the requirements and instructions for the placement method of particles and bagged samples have been added; the distinction between the pressure surface and the non-pressure surface of the original standard has been cancelled and modified; the evaluation results have been cancelled and replaced by determining whether the sample corrodes the surface of the test piece; the requirements for the description of the observed phenomenon have been added. This standard was proposed and managed by the National Technical Committee for Packaging Standardization. The drafting units of this standard are: General Research Institute of Machinery Science, Shenyang Anti-Rust Packaging Materials Co., Ltd., and China Packaging Federation. The main drafters of this standard are: Liu Hongwen, Zhang Xiaojian, Dou Zhihong, An Chengqiang, Liu Hong, and Liu Guojing. The previous versions of the standards replaced by this standard are: GB/T 16266—1996.
1 Scope
Test methods for packaging materials Contact corrosion
This standard specifies the test methods for corrosion of metal surfaces in close contact with packaging materials. This standard is applicable to contact corrosion tests of packaging materials in close contact with steel and aluminum surfaces. 2 Normative references
GB/T16266-—2008
The clauses in the following documents become the clauses of this standard through reference in this standard. For any dated referenced document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced document, the latest version shall apply to this standard. GB/T 678 Chemical Reagent Ethanol (Absolute Ethanol) (GB/T 678—2000,negISO6353-2:1983)GB/T687 Chemical reagent Glycerol (Glycerin) (GB/T687~1994,neq1ISO6353-3:1987)GB/T699 High-quality carbon structural steel
GB/T3880.1 General industrial aluminum and aluminum alloy plates and strips Part 1: General requirementsCB/T5048 Moisture-proof packaging
JB/T5520 Drying oven technical conditions
3 Terms and definitions
The following terms and definitions apply to this standard. 3. 1
Corrosion
Deterioration of the material caused by the reaction of metal or material with the environment. This deterioration is usually caused by oxidation, acid or alkali, electrochemical and other effects. In the test, as long as there is a visible change on the surface of the test piece, such as rust, pitting or the formation of loose or granular products, it is considered to be corrosion.
Stain
Only a color change occurs on the test surface without rust, pitting or surface deterioration. Discoloration is not considered corrosion in this test. 3.3
Test surface
The surface of the material that has been specially processed for checking the corrosion condition after the test. 4 Test instruments and materials
4.1 Drying oven
Should meet the requirements specified in JB/T5520.
4.2 Dryer
The inner diameter of the upper opening is 280 mm ± 5 mm, and the height is 260 mm ± 5 mm (without benefit). 4.3 Hair dryer
Hot and cold.
4.4 Glass slide
Size is 75 mm×25 mm×(3~5) mm, 1
GB/T16266—2008
4.5 Rectangular stainless steel block
Size is 75 mmx25n×25 mm.
4.6 Sandpaper
No. 240 aluminum oxide sandpaper.
4.7 Anhydrous ethanol
Should meet the requirements of GB/I678.
4.8 Glycerol
Should meet the requirements of GB/T687,
4.9 Silica gel
Fine pore type, should meet the requirements of GB/T 5048. 4.1010 carbon steel test piece
The size is 100mm×50mm×(4～6)mm, which shall meet the requirements of CB/T699, with a total of four pieces, one of which is blank. 4.112024 aluminum alloy test piece
The size is 100mm×50mm×(4～6)mm, which shall meet the requirements of GB/T3880.1, with a total of four pieces, one of which is blank. 4.12 Packaging material test piece
The size is 75mm×50mm.
5 Preparation of test pieces and samples
5.1 Grinding and cleaning of metal test pieces
Grind the processed steel and aluminum test pieces with 240 sandpaper in a direction parallel to the long side of the test piece. There shall be no pits, scratches or rust on the test surface. Then, they shall be decontaminated in three evaporators containing anhydrous ethanol. When cleaning, use a forge to hold absorbent cotton or gauze to scrub, then blow dry with hot air, and put it in a dryer containing fine-porous silica gel for use. After cleaning, do not touch the clean test piece with bare hands. The test piece prepared after grinding and cleaning should not be stored for more than 8 hours, otherwise it should be re-grinded and cleaned. 5.2 Specimens
Select the sample that is less than three turns away from the outer roll of the coil or the fourth sheet from the top of the flat plate, and cut it at least 100mm away from the edge. 5.2.1 Flexible materials
Select three pieces of 75mm×50mmrm material from different parts according to the curling direction. The surface of the sample should be flat, without holes, wrinkles, oil stains, deterioration, etc.
5.2.2 Hard materials
For harder or blocky materials, such as linings and plywood, select the flat surface of the material, with a size of 75mmX50mm, and the number is three pieces.
5.2.3 Granular materials
For granular materials, the sample should be 20g and ground to the size that can pass through a 40-mesh standard sieve but not through an 80-mesh standard sieve. For bagged materials, such as desiccants, the sample should be a minimum unit of the bagged material. 5.2.4 Sample pretreatment
Except for granular or bagged materials and packaging materials that cannot be cleaned, for soft or hard packaging materials, use one pair of tweezers to hold the sample and another pair of tweezers to hold the gauze, scrub it twice with anhydrous ethanol, and then blow it dry with cold air (or warm air below 60°C). The cleaned packaging material sample is placed in an environment with a temperature of 25°C ± 2°C and a relative humidity of 50% ± 3% for 24 hours. It is forbidden to touch the cleaned sample with bare hands. The packaging material sample should be flat. If necessary, a 75mm×75mm glass sheet can be pressed during pretreatment, and then a rectangular steel block for fixing can be pressed on it.
5.3 Cleaning of glass slides and rectangular steel blocks
Before use, glass slides and rectangular steel blocks should be cleaned twice with anhydrous ethanol, blown with hot air, and then placed in a dryer for standby use. After cleaning, bare contact with glass slides and rectangular steel blocks is prohibited.
6 Test procedure
GB/T162662008
6.1 Place three packaging material samples that have been cleaned and pre-treated according to 5.2.4 on the middle of three metal test pieces, and select the part that contacts the metal according to the actual use. For aluminum-plastic cloth composite materials, the plastic surface should be in contact with the gold mesh. For vapor phase anti-rust paper, the side coated with vapor phase corrosion inhibitor should be in contact with the metal. Press a clean and non-corrosive glass slide in the middle of each packaging material sample, and then press a rectangular steel block to fix it. The direction of the glass slide and the steel block is perpendicular to the long direction of the metal test piece (see Figure 1 and Figure 2 for details). Drum material sample
Golden plate
Figure Test piece and test piece contact method
Short copper block
Glass plate
Pack material sample
Metal test piece
Figure 2 Combination diagram
6.2 For granular samples, they should be evenly placed in the middle of two parallel lines 25mm away from the center line of the test surface of the test piece. Cover with a glass sheet, and then place a rectangular steel block on the glass sheet. 6.3 For bagged granular samples, they should be placed in the center of the test piece surface, and ensure that there is at least 50mm×50mm uncovered surface on the test piece surface. If necessary, prepare a large clean glass sheet to support the excess part of the test piece and bagged sample. 6.4 Place the three groups of test pieces assembled above in a desiccator with a diameter of about 320mtm, preheat at 49℃±2℃ for 30min, then take them out and immediately put them in a desiccator preheated at 49℃±2℃ with 300mL of 69% glycerol aqueous solution at the bottom, apply a small amount of vacuum sealing oil on the ground mouth, cover with a lid, and fix the lid at three places with medical tape, and then put it in a dry box at 49℃±2℃. At this time, the relative humidity in the desiccator is 65%±3%. The placement time for steel test pieces is 20 hours, and the placement time for aluminum test pieces is 72 hours. 6.5 After the test, remove the sample from the test piece surface and immediately check whether there are any signs of corrosion on the test piece surface. Record whether the covered and uncovered surfaces of the sample have corrosion, and describe the severity and distribution of corrosion. GB/T 16266—2008
Test report
The test report should include the following contents:
Number of this standard:
b) Detailed description of the test piece and specimen used in the test, including type, size, quantity, status, etc.: pretreatment conditions;
d) Test environment conditions:
Test parameters:
Test results, stating whether the specimen causes corrosion on the surface of the test piece;f
Differences from this standard during the test;
If the purpose of the test is only to evaluate and compare different products or methods, the report should include a detailed description of the observed phenomena; test date, signature of the tester, and seal of the testing unit. Copyright reserved. Infringements must be investigated.
Book number: 155066·1-31407
GB/T16266-2008
Price:
People's Republic of China
National standard
Test method for packaging materials-Contact corrosion
GB/T16266-2008
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