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In order to evaluate the corrosion state of power grid galvanized steel components in the atmospheric environment of Anhui Province, galvanized steel samples, which were naturally exposed for 1 and 3 a, respectively, were analyzed using scanning electron microscopy(SEM), energy-dispersive X-ray spectroscopy(EDX) and X-ray diffractometer(XRD) to investigate the compositions and morphologies of the corrosion products, thereby revealing their atmospheric corrosion mechanisms. Meanwhile, the corrosion rates of the galvanized steel samples were determined using the weight-loss method, combined with grey correlation analysis, to ascertain the influence law of major environmental factors on the atmospheric corrosion rate of the galvanized steel samples. Results showed that the atmospheric corrosion products of the galvanized steel samples consisted of ZnO and minor amounts of Zn5(OH)6(CO3)2 and Zn4(OH)6SO4. The surface of the corrosion layer featured cellular protrusions composed of flaky Zn5(OH)6(CO3)2 and Zn4(OH)6SO4, forming chrysanthemum-like patterns. The structure of the corrosion layer was dense and closely bonded to the galvanized layer, providing effective protection, and thus, the corrosion degree of the galvanized steel was low. The major environmental factors affecting the atmospheric corrosion rate of the galvanized steel samples in Anhui Province were ranked as follows: temperature > relative humidity > O3 > NO2 > PM2.5 > PM10 > SO2. Temperature and atmospheric relative humidity had a more significant impact, whereas the influence of SO2 was minimal.

Copyright of Automobile Technology & Material is the property of Automobile Technology & Material Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

A new photometric method is presented by using strong oxidant and acid corrosion solution as immersion solution. Using potassium thiocyanate as chromogenic agent, the concentration of iron ion in corrosion solution was tested by spectrophotometry. We investigated the length of time required to reach a certain value of the absorbance for different galvanized steel. The longer the time was, the better the protective performance of galvanized layer on steel substrate was. A test cycle can be completed within 5.5 hours by using this method for commenly galvanized steel in the market. The reliability of the method was verified by microscopic observation and salt spray test. This method s simple to operate greatly shorten the corrosion test time, the rapid evaluation of corrosion resistance of different galvanized steel materials. [ABSTRACT FROM AUTHOR]

Copyright of China Rural Water & Hydropower is the property of China Rural Water & Hydropower Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of New Building Materials / Xinxing Jianzhu Cailiao is the property of New Building Materials Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Bulletin of the Chinese Ceramic Society is the property of Bulletin of the Chinese Ceramic Society Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

NaCl can cause serious corrosion of galvanized steel, and the SO2 contained in the atmosphere promotes the corrosion process, so it is of great significance to study the corrosion behavior and mechanism of metals in this environmental system. In this work, alternating dry/wet corrosion in case of constant deposition salt was tested to investigate the corrosion condition and corrosion characteristics of galvanized steel in simulated coastal - industrial atmosphere using corrosion weight gain, dynamic potential polarization curves, electrochemical impedance and other analytical methods. Results showed that the corrosion degree increased with the rising of Cl - concentration. In the early stage of corrosion, the zinc layer served as a sacrificial anode to protect the substrate, and corrosion products were easy to decompose, so the corrosion degree was relatively light. In the late stage of corrosion, carbon steel began to corrode, corrosion products were the red rust, the corrosion increased significantly, the galvanized steel lost its cathodic protection previously provided by the zinc layer, and the corrosion rate increased exponentially with the prolonging of the corrosion time.

Copyright of Industrial Minerals & Processing / Huagong Kuangwu yu Jiagong is the property of Industrial Minerals & Processing Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Science & Engineering (1673-2812) is the property of Journal of Materials Science & Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The fine microstructure in high carbon galvanized steel wires from different manufacturers at domestic and abroad were experimentally characterized and compared. The results show that the microstructure of the domestic steel wires has apparently difference with that of the imported ones, in terms of the distribution of inclusion sizes, the thickness of galvanized layer, the spacing of sorbite lamella, cementite morphology, dislocation density, and etc. For instance, the percentage of the inclusions with the equivalent diameter less than 5 µm can be up to 90. 6% in the imported wire, compared with 85. 4% and 88. 0% in the domestic ones. The Zn-Fe alloy layer in the galvanized layer of the domestic wire is thicker and the coated layer is more loose. Moreover, the sorbite lamellar spacing of the domestic wire is larger and the distribution is more dispersed. It is also found that in the domestic wire, the dissolution of cementite is more serious, the number of granular and short-rod cementite particles increase significantly, and the dislocation density is to times than that of the imported one. The microstructural differences above lead to the poor performance and unstable quality of the domestic steel wire. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Harbin Institute of Technology. Social Sciences Edition / Haerbin Gongye Daxue Xuebao. Shehui Kexue Ban is the property of Harbin Institute of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Materials Engineering / Cailiao Gongcheng is the property of Journal of Materials Engineering Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of China Sciencepaper is the property of China Sciencepaper and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

：To investigate the relationship between the broken wire of galvanized steel wire and the self-magnetic flux leakage signal of metal magnetic memory, three factors of magnetic pole direction, sheath and sensor spacing were considered. The universal testing machine tensile tests were carried out on 15 galvanized steel strands, and the magnetic signals of the piece were tested by magnetometer. The magnetic signal variation of the whole process of galvanized steel wire strands specimen was obtained from the initial stretching to the broken wire, and the effects of various factors on the magnetic signal were analyzed. The results show that the load-displacement curve of galvanized steel strands can be substantially divided into four stages. At each stage of transition, each flux leakage signal component has significant change rule. The normal component of By and the tangential component parallel to the strand of Bz change abruptly, and the tangential component perpendicular to the strand of Bx is decreased steadily. For the detecting and health monitoring of cable-stayed bridges based on self-magnetic flux leakage, the variation law of magnetic signal components can be obtained through the processing analysis, and the force stage and broken wire condition of the cable can be determined. [ABSTRACT FROM AUTHOR]

An experiment program mainly about 28 groups of profiled corrugated steel sheets is introduced. By changing thickness of roofing board, thickness of purlin, height of purlin web and shape of clips for standing seam roof panel, the total torsional rigidity and factors that affect the total torsional rigidity were obtained. The torsional rigidity offered by roofing board, clip and purlin were solved separately with ANSYS, which were in good agreement with experimental results. The formulae for calculating the torsional rigidity of roofing board, clip and purlin were deduced. It is confirmed that total torsional rigid is formed by connecting three kinds of rigidity in series. Both test results and finite element analysis results show that the thickness of purlin is the most important factor which influences the torsional rigidity. [ABSTRACT FROM AUTHOR]

Application of traditional corrugated web composite box girder with perfobond rib connectors is restricted by the difficulty in casting bottom flange concrete and the low crack resistance under positive moment. To solve these problems, two improved types of composite box-girder with corrugated steel webs were proposed. The first type uses the bottom steel flange to encase the bottom concrete plate, and the second type substitutes the bottom concrete flange with pure steel flange. Loading tests on four specimens were conducted for a comprehensive study on the bearing capacity, structural stiffness, crack growth, strain distribution. Test results show that the specimen with concrete encased in the bottom steel flange has higher bearing capacity, structural stiffness and crack resistance than the traditional ones. The specimen with pure steel bottom flange shows lower self weight, adequate bearing capacity and structural stiffness, which is suitable for beams under positive bending moment. Comparison study on the economic and technical index shows that application of the two improved types of composite girders with corrugated steel webs will generate good benefits in continuous composite bridges. [ABSTRACT FROM AUTHOR]

To investigate the overall buckling behavior of Q420 high strength welded gavalized steel tubes, an axial compression column test was conducted, the buckling modes and ultimate strength were analyzed, and the buckling strength of the specimens were calculated, which were compared with the column curves in the Chinese code. It shows that the stability factor φ calculated from test results is much higher than that calculated according to the Chinese code. At the same time, the comparison of axial compressive test result between galvanized round tubes and the ungalvanized ones is introduced, and the results show that the hot galvanizing processing improves the bearing capacity. [ABSTRACT FROM AUTHOR]