The surface galvanized method of galvanized slot steel is mainly used in hot -dip galvanized. Galvanized slot steel is an effective metal anticorrosive method, which is mainly used for metal structure facilities in various industries. In fact, the steel parts remained in the rust removal are immersed in zinc liquid melted at about 440 ~ 460 ° C, so that the steel component surface is attached to the zinc layer, so as to play the purpose of anticorrosion. Tank Steel Features.
Theoretical weight table of galvanized slot steel
m weight (kg/m) galvanized slot steel q235b 5#5.44 galvanized slot steel q235b 6 .3#6.63 galvanized slot steel q235b 6.5#6.71 galvanized slot steel q235b 8 #8.05 galvanized slot steel q235b 10#10.01 galvanized slot steel q235b 12#12.06 Galvanized slot steel q235b 12.6#12.32 Galvanized slot steel q235b n14A#14. 54 galvanized slot steel q235b 16a#17.24
(1) It has thick dense dense The pure zinc layer is covered on the surface of the steel. It can avoid the contact between the steel substrate with any corrosive solution and protect the steel substrate from corrosion. In general atmosphere, the surface of the zinc layer forms a very thin and dense zinc oxide layer surface. It is difficult to dissolve in water, so it plays a certain protective effect on the steel substrate. If zinc oxide and other ingredients in the atmosphere generate insoluble zinc salts, the anti -corrosion effect is more ideal.
(2) There is an iron -zinc alloy layer, combined with dense, and expresses unique anti -corrosion resistance in marine salt fog atmosphere and industrial atmosphere; (3) due to the due to The combination of solid, zinc -iron -soluble, has strong abrasion resistance; (4) Because zinc has good ductility, its alloy layer and steel base are firm. Various molding such as making, drawing, and bending without damage to the coating; (5) After the steel structure is hot -dip galvanized, it is equivalent to an annealing treatment, which can effectively improve the mechanical performance of the steel substrate and eliminate the steel parts. The stress is conducive to the carving of the steel structure. (6) The surface of the hot -dip galvanized part is bright and beautiful. (7) The pure zinc layer is the most plastic layer of galvanized layer in thermal galvanized. Its nature is basically close to pure zinc and has ductility, so it is rich.
The judgment criteria of galvanized slot steel 1. Attachment It is mainly determined by the thickness of the galvanized layer. Therefore, the measurement thickness is often the basis for determining the quality of galvanizing quality. The galvanized layer has different reactions on the surface of the steel surface. The speed also has a great impact. Therefore, the thickness of the plating layer with exactly one is actually unlikely. Therefore, the amount of attachment must not be determined by a single (location). It is necessary to measure the average zinc weight (G) of its unit area (㎡) to measure the measurement of the unit area (㎡).
The method of measurement to measure the amount of attachment, such as destructive slicing gold -phase observation method, pickling method, non -destructive membrane thicknesses, electrochemical methods, advancement, advancement, and advancement The weight difference method of shipment weight. Generally commonly used is the membrane thick meter and pickling method. Mascal thickness (coating meter) is the most commonly used method to measure the thickness of the zinc layer by using magnetic field induction. The basic conditions are that the surface of the steel must be smooth and complete in order to get more accurate numbers. Therefore, at the corner of the steel or rough, angle steel or casting, etc., it is unlikely an accurate number. Ordinary iron parts are used with raw iron sinensis, which can still get quite accurate numbers, and the castings are absolutely inaccurate. This is the most accurate method for the formal inspection report. However, when slice, you must pay attention to the fair choice of the upper and lower parts to get accurate numbers. However, there are also disadvantages, such as a lot of time, the area of complex steel is not easy to obtain, and too large can not pick up the whole. Therefore, it is enough to make full use of the membrane thicknesses to control the on -site process, and it is enough to use the acid washing method to do the final test.
2. Putting one -nature The most rusty parts of hot -dip galvanized steel are still the thinnest part of the zinc layer. Therefore, it is necessary to test whether the thinnest part is in line with standard. The test method of uniformity is generally tested by copper sulfate, but this method is very problematic for the galvanized layer cortex tests composed of zinc layer and alloy layer. This is different from the dissolving speed of the zinc layer and the alloy layer in the copper sulfate test solution, and the alloy layer varies depending on the ratio of zinc/iron. Therefore, it is not reasonable to determine that the uniformity is determined by a certain number of times of impretion time. Therefore, in the recent European and American specifications and JIS, there is a tendency to abolish the method of this test, which replaces the average sexuality of the distribution. It is mainly visually or touching. The complicated small components are not easy to measure due to the amount of area, and it is not easy to obtain the average membrane thickness. Sometimes it has to be used as a reference with copper sulfate testing method, but it must not replace the purpose of the attachment measurement with copper sulfate test.
3. Holiday The so -called solidity is the density of galvanized layer and steel. It mainly requires galvanized components The nature of the peeling is generally inspected. This is to hit the test film with the hammer to check the surface of the surface of the coating skin. Fixed the test film to avoid high and horizontal support of the hammer. The hammer is centered on supporting the table, so that the handle is naturally falling, and the 4mm intervals are parallel to 5 points. However, within 10mm or end of the angle or end, this test must not be performed. The same place cannot be hit more than 2 times. This method is the most common, suitable for solid testing of skin film such as zinc, aluminum. Others such as squeezing and volume attachment are generally rarely used, so it is not mentioned for the time being.
The ordinary people often have a wrong concept. Often, for the convenience of measurement of solidity, two galvanized steels are taken to each other with corners to observe the corners of the corner. There are just a few thicker zinc particles on the corner. If it is not handled well in the operation, if you hit it hard, the thick zinc particles will definitely peel off. Therefore, this method cannot be used to determine the density of normal galvanized cortex and iron -based. The attachment volume, homogeneity, and solidity, which is a project that defines the quality inspection of heat -soaking galvanized mass in general specifications. It is also the standard of generally formal inspection reports above is an analysis of the theoretical weight table and characteristics of galvanized galvanized slot steel. I hope it can help you. When you buy galvanized slot steel, it is best to use the criteria for judging the criteria. Selection, such as attachment, average, and solidity, this is also the standard for generally formal inspection reports, so that you can buy a galvanized galvanized slot steel.
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