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FeMoAl COATING AND ITS HIGHTEMPERATURE SULFIDATION PROPERTIES

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中国有色金属学会会刊：英文版 1997年第2期7卷 119-123页

作者： Li, Fang He, Yedong qi, huibin Huang, Zhenzhong Zhu, Rizhang Univ of Science and Technology Beijing Beijing China

ＦｅＭｏＡｌＣＯＡＴＩＮＧＡＮＤＩＴＳＨＩＧＨＴＥＭＰＥＲＡＴＵＲＥＳＵＬＦＩＤＡＴＩＯＮＰＲＯＰＥＲＴＩＥＳ①ＬｉＦａｎｇ，ＨｅＹｅｄｏｎｇ，ＱｉＨｕｉｂｉｎ，ＨｕａｎｇＺｈｅｎｚｈｏｎｇ，ＺｈｕＲｉｚｈａｎｇＢ... 详细信息

ＦｅＭｏＡｌＣＯＡＴＩＮＧＡＮＤＩＴＳＨＩＧＨＴＥＭＰＥＲＡＴＵＲＥＳＵＬＦＩＤＡＴＩＯＮＰＲＯＰＥＲＴＩＥＳ①ＬｉＦａｎｇ，ＨｅＹｅｄｏｎｇ，ＱｉＨｕｉｂｉｎ，ＨｕａｎｇＺｈｅｎｚｈｏｎｇ，ＺｈｕＲｉｚｈａｎｇＢｅｉｊｉｎｇＣｏｒｏｓｉｏｎａｎｄ...

关键词： FeMoAl coating high temperature sulfidation Al selective oxidation

A Robust Digital Watermarking Algorithm Based on Finite-Set Discrete Radon Transform Tight Frame

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Journal of Computer and Communications 2020年第12期8卷 123-133页

作者： Jiangui Zhang huibin qi Guangdong Huiyu Intelligent Survey Technology Co. Ltd. Zhuhai China Hunan Jiajia Car-Parking Technology Co. Ltd. Changsha China

Digital watermarking technology plays a powerful role in the effective protection of digital media copyright, image authentication, image sharing, image information transmission and other fields. Driven by strong demand, digital image watermarking technology has aroused widespread research interest and has gradually developed into one of the most active research directions in information science. In this paper, we present a novel robust digital watermarking algorithm based on discrete radon transform tight frame in finite-set (FDRT). FDRT of the zero mean image is a tight frame, the frame boundary A = B = 1, the dual of the frame is itself. The decomposition and reconstruction of the FDRT tight frame will not cause the phenomenon of image distortion. The embedding of hidden watermark is to add a weak signal to the strong background of the original image. Watermark extraction is to effectively identify the embedded weak signal. The feasibility of the watermarking algorithm is analyzed from two aspects of information hiding and robustness. We select the independent Gaussian random vector as the watermark series, and the peak signal-to-noise ratio (PSNR) as the visual degradation criterion of the watermark image. Basing the FDRT compact stand dual operator, we derived the relationship among the strength parameter, square sum of watermark series, the PSNR. Using Checkmark system, the simulation results show that the algorithm is robust enough to some very important image processing attacks such as lossy compression, MAP, filtering, segmentation, edge enhancement, jitter, quadratic modulation and general geometric attack (scaling, rotation, shearing), etc.

关键词： Digital Watermarking Data Mining Discrete Radon Transform Tight Frame Copyright Protection Information Hiding Finite-Set

A Robust Digital Watermarking Algorithm Based on Finite-Set Discrete Radon Transform Tight Frame

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维普期刊数据库

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A Robust Digital Watermarking Algorithm Based on Finite-Set ...

PROTECTION　AND　DAMAGE　OF　PREFORMED　OXIDE　SCALES　OF　Fe－25Cr－5Al　AND－10Al　ALLOYS　DURING　THEIR　SUBSEQUENT　SULFIDATION

作者： Jiangui Zhang huibin qi Guangdong Huiyu Intelligent Survey Technology Co.Ltd.

Digital watermarking technology plays a powerful role in the effective protection of digital media copyright, image authentication, image sharing, image information transmission and other fields. Driven by strong demand, digital image watermarking technology has aroused widespread research interest and has gradually developed into one of the most active research directions in information science. In this paper, we present a novel robust digital watermarking algorithm based on discrete radon transform tight frame in finite-set（FDRT）. FDRT of the zero mean image is a tight frame, the frame boundary A = B = 1, the dual of the frame is itself. The decomposition and reconstruction of the FDRT tight frame will not cause the phenomenon of image distortion. The embedding of hidden watermark is to add a weak signal to the strong background of the original image. Watermark extraction is to effectively identify the embedded weak signal. The feasibility of the watermarking algorithm is analyzed from two aspects of information hiding and robustness. We select the independent Gaussian random vector as the watermark series, and the peak signal-to-noise ratio（PSNR） as the visual degradation criterion of the watermark image. Basing the FDRT compact stand dual operator, we derived the relationship among the strength parameter, square sum of watermark series, the PSNR. Using Checkmark system, the simulation results show that the algorithm is robust enough to some very important image processing attacks such as lossy compression, MAP, filtering, segmentation, edge enhancement, jitter, quadratic modulation and general geometric attack（scaling, rotation, shearing）, etc.

关键词： Digital Watermarking Data Mining Discrete Radon Transform Tight Frame Copyright Protection Information Hiding Finite-Set

来源： cnki会议评论

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cnki会议

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中国有色金属学会会刊：英文版 1994年第4期4卷 66-71页

作者： qi, huibin Zhu, Rizhang He, Yedong Wang, Shujuan (Department of Surface Science and Corrosion Engineering,University of Science and Technology Beijing,Beijing100083)

ＰＲＯＴＥＣＴＩＯＮＡＮＤＤＡＭＡＧＥＯＦＰＲＥＦＯＲＭＥＤＯＸＩＤＥＳＣＡＬＥＳＯＦＦｅ－２５Ｃｒ－５ＡｌＡＮＤ－１０ＡｌＡＬＬＯＹＳＤＵＲＩＮＧＴＨＥＩＲＳＵＢＳＥＱＵＥＮＴＳＵＬＦＩＤＡＴＩＯＮ￥Ｑｉ，Ｈｕｉｂ... 详细信息

ＰＲＯＴＥＣＴＩＯＮＡＮＤＤＡＭＡＧＥＯＦＰＲＥＦＯＲＭＥＤＯＸＩＤＥＳＣＡＬＥＳＯＦＦｅ－２５Ｃｒ－５ＡｌＡＮＤ－１０ＡｌＡＬＬＯＹＳＤＵＲＩＮＧＴＨＥＩＲＳＵＢＳＥＱＵＥＮＴＳＵＬＦＩＤＡＴＩＯＮ￥Ｑｉ，Ｈｕｉｂｉｎ；Ｚｈｕ，Ｒｉｚｈａｎｇ；Ｈｅ...

关键词： Fe-25Cr-5Al Fe-25Cr-10Al preoxidation sulfidation

同方期刊数据库

“Quartus scale” of hot-rolled strip steels and its formation mechanism

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Baosteel Technical Research 2007年第1期1卷 42-54页

作者： huibin qi Yuhai qian Wei Wang Hua Zhang Baosteel Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China

The types and growth of various oxide scales formed during the different phases of the production of hotrolled strip steel products are reviewed. Similarities and differences between the ＂tertiary scale＂ on the surface of carbon steels at high temperatures and the oxide scale on pure iron are compared. The micro-structural features of the ＂final oxide scale＂ on the surface of strip steels at room temperature as well as the relationship between these features and the position of the steel coil （plate） and the subsequent processes of recoiling, temper rolling and trimming, etc. are summarized. The actual oxide scales retained on the commercial hot-rolled strip steels at room temperature have been proposed to define as ＂ quartus scale＂ for the first time. The micro-structural development and phase transformation of the initial ＂tertiary scale＂ during and after cooling and coiling are described. The reasons for the ＂tertiary scale＂ on carbon steels differing from the oxide scale formed on pure iron, and the major influencing factors in the formation of various types of ＂quartus scales＂ are analyzed from both thermodynamic and dynamic viewpoints. The development mechanism of ＂ quartus scales＂ is discussed and the potential effects of the ＂ quartus scale＂ state （thickness, constitution, structure and defects）, on the rusting and pickling properties of commercial hot-rolled strip steel, as well as on the mechanical properties of oxide scales are analyzed.

关键词： hot-rolled strip steel quartus scale microstructure oxidation phase transformation surface properties

INFLUENCE OF Al ON HIGH TEMPERATURE SULFIDATION OF AN Fe-25Cr ALLOY IN H_2S-H_2 GAS MIXTURES

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中国有色金属学会会刊：英文版 1993年第4期3卷 43-49页

作者： qi,huibin Zhu,Rizhang Department of Surface Science and Corrosion Engineering,University of Science and Technology Beijing,Beijing 100083,ChinaWang,Shujuan Northeastern Unirersity,Shenyang 110006,China

The effects of 5 wt.-% Al and 10 wt.-% Al on the sulfidation behaviour of the Fe-25Cralloy in H2S-H2 gas mixtures in the temperature range of 700～900 C has been *** resistance of Fe-25Cr was improved and the sulfide scale morphologies,compositionand structure of Fe-25Cr changed *** sulfidation kinetics of the alloys with alu-minium obeyed basically the parabolic law after an initial period of reaction *** sulfida-tion mechanism of the Fe-Cr-Al alloy has been proposed.

关键词： Al Fe-25Cr H2S-H2 gas mixtures sulfidation

Mill scale structure and damp heat corrosion performance of four 510L hot-rolled strips

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Baosteel Technical Research 2011年第2期5卷 46-52页

作者： qi huibin WANG Wei qiAN Yuhai DONG Chaofang LI Xiaogang Welding ＆ Surface Technology Division Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China Corrosion and Protection Center University of Science and Technology BeijingBeijing 100083China

In this study, the matrix structure, state and composition of the mill scales of four typical domestically made 510L hot-rolled strips were observed and analyzed by means of optical microscopy （OM） ,scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The corrosion behavior of the steels with and without mill scales were investigated by means of hot-humid corrosion tests under the condition of relative humidity （ RH ） of 95% at 50℃ and 70℃, respectively. The results show that the matrix structures, state, composition and thickness of mill scales vary in the strips. The rusting starting time of the specimens with scales is generally a bit longer than that of the specimens without scales, but their corrosion mass-gain is higher. For these two kinds of specimens ,their corrosion rate increases significantly with the increase of temperature. The rusting behavior of the 510L strips produced by various plants is different due to the variations of hot-rolling processes and designed chemical compositions. Various relevant aspects should be taken into account in the evaluation of the corrosion behavior of hot-rolled strips.

关键词： 510L hot-rolled strip steel matrix structure scale structure corrosion behavior

Corrosion characteristics and mechanism of the S135 drill pipes in slurry

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Baosteel Technical Research 2009年第2期3卷 13-15页

作者： ZHOU qingjun GUO Jinbao qi huibin qiAN Yuhai WANG Wei Welding ＆ Surface Technology Division Baosteel Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China

The corrosion mechanism of the S135 drill pipes was investigated through observation of the corrosion morphology and analysis of the corrosion products by scanning electronic microscope （ SEM）, energy dispersive spectrum （EDS） and X-ray diffraction （XRD）. The results show that the localized corrosion on the outer surface of the drill pipes was caused by oxygen corrosion due to the action of retained slurry. Cl - contained in slurry accelerated the corrosion and promoted the development of corrosion pits. Suggestions for mitigating or preventing such corrosion of the drill pipes are proposed based on the research results.

关键词： S135 drill pipe slurry oxygen corrosion Cl- ions

Rusting behavior and preventative measures of hot-rolled steel plates for automobile applications

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Baosteel Technical Research 2009年第2期3卷 3-6页

作者： qi huibin qiAN Yuhai ZHANG Hua ZHOU qingjun WANG Wei Welding ＆ Surface Technology Division Baosteel Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China

As one of the important categories of hot-rolled products, hot-rolled steel plates for automobile applications generally undergo uniform corrosion or localized corrosion according to different environments of manufacturing, transportation and/or storage of the plates. General corrosion often takes place on the surface of a plate in the exterior part of a package, and only reduces the thickness of the plate and slightly increases the roughness of the surface; however, localized corrosion on the surface of a plate inside the package is likely to result in the formation of pit-like defects on the substrate of the plate, which cannot be removed thoroughly by normal acid pickling or sand blasting, and affects the application of the plate. This research report analyzes the phenomena and characteristics of the rusting behavior of hot- rolled steel plates for automobile applications, and the influencing factors are summaried. The corresponding preventative measures are proposed.

关键词： hot-rolled steel plates for automobile applications rusting pit-like defects preventative measures