This standard specifies the principles, specimens, test equipment, test solutions, test conditions and procedures, and test result calculation of the galvanized steel wire layer quality test methods (weight method and gas method). The galvanized layer described in this standard includes pure zinc layer and zinc alloy layer. The weight method and gas method of this standard are both applicable to the determination of the quality of the zinc layer of galvanized steel wire, but the weight method shall be used in arbitration tests. The weight method of this standard is applicable to hot-dip galvanized steel wire and also to electro-galvanized steel wire. The gas method is applicable to electro-galvanized steel wire, and hot-dip galvanized steel wire can also be used for reference. GB/T 2973-2004 Test method for quality of zinc layer of galvanized steel wire GB/T2973-2004 Standard download decompression password: www.bzxz.net

GB/T 2973-2CD4
The standard is to be changed to TSC) 11G: 392 Fully coated steel material Yan chain zinc layer unit surface quality or method determination
This standard replaces B/3-Breaking front feed zinc layer test method This standard requires the use of S1: 9 steel material potential galvanized room unit surface quality single method determination of zinc material. This standard adopts 15) 706S, 68 steel wire coating craftsman A, the technical content is consistent with it, the relevant information is relatively convenient, and the points of this national standard and international standard are distinguished in the information recording A. Due to the special needs of the wheel country and the industry: this standard has been widely revised when adopting the international standard. These technical differences are marked with vertical single lines in the margins of the clauses they refer to. The appendix gives the technical differences and their reasons for reference, and the table is for reference. The following are the abbreviations: delete the standard sheet of the dangerous area. Compared with the R/￥973-1991, the main changes of this cup standard are as follows: the "area of ​​test and development" is divided into two parts: the increase of 2.1.2.2, the safety requirements for sampling, the original direct wave is cancelled, the liquid affinity is changed to: at least 0.8 and 0018, the original coating meter formula and the test method of the ear are changed to the optional layer of this standard. Appendix and Part B are data performance records. This international standard was sponsored by the China Iron and Steel Association. This standard was sponsored by the Shanghai Second Iron and Steel Co., Ltd., the China Metallurgical Industry Standardization Institute. The main drafters of this standard are: China National Standard for Frequency, Peak, Ripple, Air Surface, Sound Effect, 4 International Standards First Issued in March 1932: The first revision was made in March 1931. T
Galvanized Steel Wire Zinc Layer Quality Single Test Method
GB/T 2973—2004
This standard specifies the test methods for the quality of light zinc coating (both gravimetric and gas methods), sample preparation, test equipment, test margins, test conditions and steps, and calculation of test results. This standard specifies the zinc coating, including pure zinc coating and zinc alloy coating. The gravimetric method and gas method of this standard are both suitable for determining the actual quality of plated light zinc coating, but the gravimetric method should be increased during the punching test. The gravimetric method of this standard is used for hot-dip galvanized steel wire, and the gas method is used for electric galvanizing. The electric galvanizing effect of the airbed is used. Hot dip galvanizing can also be used.
2 Test method
2.1 Test method
Principle
Principle of the test method The zinc layer of the sample is rolled for three weeks. The sample is marked with the mass before and after the zinc layer and the diameter after the zinc layer is maintained. The mass of the zinc layer on the surface of the sample is measured. 2.1.2 Weight method sample
2.1.2.1 The length of the test piece is cut according to Table 1
Wire diameter
6. 1>--c. f3
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>1. 1--3. 0u
2.1.2.2 When cutting the sample, be careful to avoid surface damage. The sample with obvious damage should be removed. Note: The sample should be removed for 10 minutes.
2.1.2.3 Before the test, remove the sample from the ethanol and gasoline agent. If necessary, wipe it with a chemical agent and wash it with water. 2.1.3 Or or test liquid
2.1.3.1 Method One of the following solvents is used as the test liquid (the reagents used in the preparation are all chemically pure!): The constant fiber test should use liquid a! 3. =g six effect four glue ((CF,), V. concentration = 500mL of the limit (sweep) For density above 1.18), use steamed stuffing a?
water sieve 1ccomL.
Use three bottles or dioxygen brocade to take the same degree of 11 F? standard fire stock solution, use the above aldehyde 100ml. Add 5m]. The original exciting ratio is used to prepare the test solution 2.1.3.2 The test solution can be used under the conditions of the solution, and the reaction can be used alone. 2.1.4 Weight method test conditions and steps
2.1.4.1 Color quantity proof pad zinc number before the sensitivity of the wire diameter of the person 3. Special mm less box accuracy 0.16 wire diameter ratio U.50mm to > situation accurate to 0.c:g.
2, 1.4.2 The sample point is set and the test hoop is extended. The test fence is longer than the wearer, and the test cow is bent or rolled. 2.1.4.3 The occurrence of oxygen is significantly reduced. After the penetration layer is completely covered, take out the sample and wash it immediately with water and replace it with clean cotton cloth to dry it thoroughly. Weigh the quality of the zinc layer removed from the test again. The wire diameter is greater than 0.30mm and the accuracy is at least 0.001g. The wire diameter is greater than 0.30mm and the accuracy is at least CU-1. 2.1.1.4 Measure the straightness of the test wire after removing the zinc layer. It should be measured once on the same mesh, and the position multiplied by two buckles should be measured again to find the average value. Accurate to 0.Glcam.
2.1.5 Calculation of true or false test results
The wire is measured by the compression method (connection method),
where:
W:x4x1963
The mass of the zinc layer on the steel surface is in grams per square meter (g/m); The mass of the sample before removing the zinc layer is in grams (); The mass of the sample after removing the zinc layer is in grams (); The diameter of the sample after removing the zinc layer is in grams (). Meter (rm) sheet,
According to the manual, the thickness of the zinc layer can be calculated by the following method (2):
galvanized steel layer tensile strength, the point is grams per cubic meter (/m ton density of the front layer is 7.2/m*) 2.1.6 Reproducibility
Reproducibility (test different. Different installation and operation conditions are the same) is about 5 of the average value. 2.2 Gas method
22.! Put the steel wire into the hydrochloric acid density, the reading layer of the sample, according to the front layer of the separation of hydrogen gas product: said the amount of zinc layer of the gas method). According to this method to determine the relationship between the armor layer mass and the test sample surface area, the zinc member after the unit surface area of ​​the mountain to the wisdom of the residual salt. 2.2.2 Reagents, 2.2.2.1 Hydrochloric acid of appropriate concentration, 2.2.2.2 Coronavirus agent such as hexamethylenetetramine (CTH, N), succinimide (SIC1, or SbD). 2.2.3 Apparatus or test table shall consist of the following parts (see Figure 1). 2.2.3.1 Measuring tube with a center for the spherical sound, end with vein cellar 2.2.3.2 Burning bottom nozzle, rubber and measuring bottom, see Figure 1. 2.2.3.3 Measure, remove the zinc layer after the sample, 2.2.4 Test method: Carefully cut the test wire, fine straighten the wire sample. Accurately measure the length of the plate. Sample length is shown in Table 2. Table 2 Sample length www.bzxz.net
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7.2.5 Test procedure
Figure 1 Gas method zinc layer or continent measuring device
GB/T 2973-2004
2.2.5.1 Lay the purple capsule h, the inside of the measuring tube and the flask are filled with the pad liquid containing the coil partner (2.2.2.2): 2.2, 2.1:. 2.2.5.2 Grab the high-hydrochloric acid calcination and (2.2..1.2), the measuring tube (2.2.3.1: molten water A blood sample reaches the standard, the next step. Make the urine table and the flask sieve be the plane of the company.
2.2.5.3 After the sample is coiled from the front port a, close the flag and the sample is released from the acid layer and the hydrogen gas is released from the upper part of the measuring tube.
2.2.5.4 When the room gas is no longer released, some gas pieces will appear on the surface of the steel wire) relative to the measuring flask, so that the rate of release of the measuring tube and the standard is generally at the same level. The setting of the tube will be effective, indicating the volume of the released gas. 2.2.5.5 Adjust the fast burning version of the standard to push the remaining liquid in the measuring flask into the case 2.2.5.6 Open the stopper and swirl the sample, so that the sample can pass through the measuring cup 2.2.3, 3). Before measuring the selected length and straightness, wash the sample carefully.
2.2.5.7 Only one sample is tested at a time, and the test nozzle in the early part is kept at 20 32.2.6 The calculation of the surface quality of the layer is as follows: 2723V
3! One square meter The mass of the trapped gas is expressed in grams per half a year (m) - the diameter of the six layers of the wire is expressed in millimeters (mm) - the volume of hydrogen released in each test is expressed in meters (mm) (3:
The external atmospheric pressure is 740mtuH-730m.mITz or? 3) The right side is a coefficient of /760.1! :, a winter water buffalo (mnnlg)
International Engineering.The mass of the cooling layer per half square meter of surface area can be tabulated as a function of the wire diameter and the oxygen content. This directly calculates the mass of the cooling layer per unit surface area. 3 Test report
Test report, test report, case rate and actual reference, a) This standard number Test method
b: Sample type Observation format;
Test results:
11 1 mmHg-133. 322 [a.
CB/T2973-20D4
Appendix A
(Informative comparison)
This standard chapter and article are consistent with 15U1460, 1992 "Determination of the single unit area of ​​zinc layer on hot-dip galvanized steel materials"
Table 4: Reference to this standard and 15(1450: 1992 case number comparison list Table A.1 This standard article number and IS) 146C, 1992 article number comparison number
2. 2 - 3, 3.6 Technical differences between this standard and [SD1460:1992 Metallic steel materials - Determination of the amount of zinc per unit area in hot-dip galvanized layers] (GB/I2973-2304) and their causes Table 1 gives the technical differences between this standard and ISO 14ED:1992 and their causes Table B gives the technical differences between this standard and ISO 14ED:1992 and their causes 2. 1. a. 1 2. 1. 1. 1. 2. 1. 4. 3 2. 2-- 2. F
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