wlan怎么读Appendix A
German test method TL 8135-002
Testing of Anti-Corrosive Effect of VCI Auxiliary Packaging Materials
绩效考核管理系统A.1 Purpo and Area of Application
A high humidity level in the air and/or condensation can lead to corrosion even in airtight materials, thereby rendering the materials unusable. For protection against corrosion damage, VCI-bad auxiliary packing materials can be ud.
The testing process described below is ud to determine the anti-corrosive effect of VCI-bad paper and foil. The process may be ud to characterize the state at the time of supply and/or for checking the state of the VCI auxiliary packing materials after storage.
A.2 Definitions of Terms
VCI auxiliary packing materials are made of smooth or crepe paper or of plastic foil provided with a relatively volatile anti-corrosive effective ingredient. The effective ingredient fills the gas space inside th
e packing and protects the packed goods themlves against corrosion in a humid atmosphere. Packed goods to be protected with VCI auxiliary packing materials must be packed in aled packages (plastic/metal bags, sacks, containers), as otherwi the effective ingredient dispers into the environment.
A.3 Principle of the Test Method
A test sample with a high degree of nsitivity to corrosion through condensation water is packed together with a VCI auxiliary packing material in a vesl, which is then tightly clod. Condensation is then forced on the surface of the test sample. By means of a blank trial -- that is, a trial structure of the same type, but without VCI auxiliary packing material -- it is determined whether the conditions of the trial are sufficient to cau corrosion to appear on the unprotected test sample.
A.4 Test Equipment and Material
For each test, 4 test ts are necessary. A test t consists of the following parts (e Figure 1):
4.1 Erlenmeyer flask, 1 L, wide-necked, according to DIN 12385
4.2 Rubber stopper, 54 mm ∅, with longitudinal through hole, 15 mm ∅, and two splits n the bottom f
or clamping the sample.
4.3 Test sample of unalloyed, solid construction steel S235JRG2 DIN EN 10025 (material number 1.0038), mass according to Figure A.1.
4.4 10 milliliters freshly prepared glycerin/water mixture with a density of 1.076 g/cm3 at (23 ± 2)°C (glycerin/water mass ratio about 1:2; for additional instructions for preparation, e DIN 50008-1).
4.5 Ethanol p.a.
4.6 Wet sandpaper up to #320 graining.
4.7 Forced-air heating chamber according to DIN 50011-12.
A.5 Samplesinhospital
5.1 Taking Samples
Samples will be taken according to agreement, either in the state at the time of supply or according to a composition to be determined.
5.2 Sample Dimensions All samples will be compod of strips 25 x 150 mm in diameter.
5.3 Number of Samples Each test will require six strips.
5.4 Sample Handling
The samples are to be taken and cut immediately before the start of the test. This is in order to prevent contact between the sample and the unprotected hand. The u of rubber gloves is recommended. A.6 Performance of Test
6.1 Before putting together the test t, the front of the test sample is sanded with wet sandpaper up to #320 graining.
1 = Rubber stopper,top diameter 53 mm,bottom diameter 45 mm, hole diameter 15 mm;
2 = Test sample S235JRG2,length 12 mm, diameter 16 mm;
[figure A-1] 3 = VCI sample 25 mm x 150 mm; 4 = Erlenmeyer flask, 1 L, wide-necked, according to DIN 12385;
5 = Glycerin/water mixture, p = 1.07
6 g/cm 3 at 23°C;
6 = Cuts 5 mm deep to accept the sample Cross-ction A-B
6.2 Before putting together the four required test ts, the parts listed under Sections B.4.1 to B.4.3 are thoroughly cleaned by rinsing with distilled water and ethanol and dried with warm air. 6.3 The parts listed under Sections 4.1 to 4.3 are put together according to Figure A.1. In this process and during any additional handling, the sanded surface of the test sample must not come in contact with corrosive media (such as perspiration from human hands).
6.4 In each of three test ts, two samples are inrted in the slits provided for this purpo in the rubber stopper. The fourth test t remains without samples, for u in the blank trial.
6.5 The Erlenmeyer flasks are tightly clod with the rubber stoppers of the asmbled test ts.
6.6 The test t is stored for a period of (20 ± 0.5) hours at a temperature of (23 ± 2)°C. At the end of the storage period, the rubber stopper is removed from the Erlenmeyer flask, the freshly prepared glycerin/water mixture is poured into the flask immediately after opening, and the flask is immediately clod again.
When closing the flask, and in any additional handling, care must be taken to obrve that the samples are not immerd in the glycerin/water mixture.
6.7 After an additional 2 hours ± 10 minutes, the test t is stored for a period of 2 hours ± 10 minutes in the heating chamber in which the temperature was previously raid to (40 ± 1)°C.
6.8 On conclusion of storage in the heating chamber, the test samples are this asmbled from the test t and dried with warm air.
A.7 Evaluation
The sanded surface of the test samples is visually inspected for signs of corrosion and matched with one of the stages shown in Figure A.2.
When performing the test according to the directions, significant signs of corrosion must be visible on the sanded surface of the test sample from the blank trial. Otherwi, the test must be repeated.
A.8 Test Report
elong
视听说3答案截图The test report must cover the following points, with reference to this testing process:- Data on the s
ample material (manufacturer, material designation, manufacturing date, packaging, packaging date, etc.).
- Any test conditions deviating from this test procedure.
allowance
- Evaluation of the effectiveness (stage) of the sample material (e Figure A.2).
广州话翻译date.
- Test
Note:
Any appearance of corrosion on the test samples can be documented by photographing the sanded surfaces or by the production of corrosion samples. The latter is done by pressing a piece of transparent adhesive tape onto the sanded surface, pulling it away along with the corrosion adhering thereto, and sticking it onto white paper.
Figure A-2
Stage 0: Blank sample No anti-corrosive effect
Stage 1: Blank sample Slight anti-corrosive effect
乔治亚理工Stage 2: Blank sample -Moderate anti-corrosive effect
Stage 3: Blank sample - Good anti-corrosive effect
Referenced Documents
TL 8100-0003 Packaging of supply articles; packing stage C金山 在线翻译
TL 8100-0072 Packaging material; marking of its material content
VG 95615 Closing boxes with adhesive tape and adhesive strips
DIN 6730 Paper and cardboard; definitions
huiji
DIN 6748-1 Paper, cardboard and pasteboard rewinding tubes for paper,
cardboard and pasteboard, mass, testing of mass
