Corrosion products and corrosion-induced cracks of low-alloy steel and low-carbon steel in concrete

2018 ◽  
Vol 88 ◽  
pp. 121-129 ◽  
Author(s):  
Jinjie Shi ◽  
Jing Ming ◽  
Yamei Zhang ◽  
Jinyang Jiang
Keyword(s):  
Carbon Steel ◽  
Alloy Steel ◽  
Low Carbon Steel ◽  
Corrosion Products ◽  
Low Carbon ◽  
Low Alloy Steel

Study on Low-Alloy Coupled Steel Technological Applications

2011 ◽  
Vol 230-232 ◽  
pp. 159-163
Author(s):  
Bing Gao ◽  
Bo Wang ◽  
Jian Qi Zou
Keyword(s):  
Carbon Steel ◽  
Alloy Steel ◽  
Crack Width ◽  
Low Carbon Steel ◽  
Transverse Reinforcement ◽  
Longitudinal Reinforcement ◽  
Paper Study ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Steel Bars

Low-alloy steel coupled steel bars is formed to ladder-framework by two parallel cold-drawn that’s they are longitudinal reinforcement wedding with short and band cold-drawn that’s low-carbon steel are transverse reinforcement. In this paper, study on its mechanical and technology properties. So, get suggestion model calculating formulas of crack width and stiffness are presented. The advantages of cooperating between coupled steel bars and concrete have been primarily accepted.

scholarly journals Influence of processing parameters on slab stickers during continuous casting

2020 ◽  
Vol 39 (1) ◽  
pp. 228-235
Author(s):  
Yu Liu ◽  
Yuanpeng Tian ◽  
Xudong Wang ◽  
Yali Gao
Keyword(s):  
Carbon Steel ◽  
Continuous Casting ◽  
Alloy Steel ◽  
Casting Speed ◽  
Low Carbon Steel ◽  
Processing Parameters ◽  
Slab Thickness ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Efficient Technology

AbstractIn this study, the parameters of 44 sticker breakout samples were analysed. The research mainly focused on the steel grades and slab thickness of stickers. Other processing parameters, such as slab width, casting speed, mould fluctuation, heat flux and operation, were also discussed. The results show that the number of stickers of low carbon steel and low alloy steel was 16 and 28, respectively. The stickers of low carbon steel were less than those of low alloy steel regardless of the thickness and width. The ratio of stickers per 1,000 casting heats of 220, 260 and 320 mm thickness slabs was 2.5, 0.5 and 0.6, respectively. The higher casting speed of 220 mm thickness slabs made the casting status unsteady and caused more stickers. From the perspective of width, the stickers were gradually increased along with the increase in width due to the worse mould slag. This study provides a foundation to reduce slab stickers and is helpful for a more efficient technology of continuous casting.

The transformation of corrosion products on 0Cu2Cr carbon steel in the marine

2021 ◽  
Vol 68 (5) ◽  
pp. 457-463
Author(s):  
Hongyu Liu ◽  
Yingxue Teng ◽  
Jing Guo ◽  
Qinghe Xiao ◽  
Miao Wang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Energy Dispersive Spectrometer ◽  
Low Carbon Steel ◽  
Transformation Process ◽  
Corrosion Products ◽  
Low Carbon ◽  
X Ray Diffraction ◽  
Transformation Mechanism ◽  
Content Type ◽  
Marine Engineering

Purpose This paper aims to explore the transformation process and transformation mechanism of carbon steel under the marine environment. Design/methodology/approach In this paper, the transformation and rust layers corrosion products on 0Cu2Cr carbon steel with different cycles coupon test was investigated and deeply explored by scanning electron microscope, energy dispersive spectrometer, X-ray diffraction. Findings The results showed that the thickness of rust layers grew from 71.83 µm to 533.7 µm with increasing duration of corrosion. The initial corrosion product was γ-FeOOH, then part of the γ-FeOOH continued growing, and under the capillary action, the other part of the γ-FeOOH transformed to α-FeOOH. Originality/value To the best of the authors’ knowledge, this paper puts forward for the first time a new viewpoint of the development of corrosion products of low-carbon steel in two ways. This discovery provides a new idea for the future development of steel for marine engineering.

The Relation between Corrosion Rate and Corrosion Products from Low Carbon Steel

2000 ◽  
Vol 220 (1) ◽  
pp. 351-356 ◽  
Author(s):  
A.L. Morales ◽  
D. Cartagena ◽  
J.L. Rendón ◽  
A. Valencia
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Low Carbon Steel ◽  
Corrosion Products ◽  
Low Carbon

scholarly journals Corrosion rate and corrosion behaviour analysis of carbon steel pipe at constant condensed fluid

10.30544/591 ◽  
2021 ◽  
Author(s):  
Ahmad Royani ◽  
Siska Prifiharni ◽  
Gadang Priyotomo ◽  
Sundjono Sundjono
Keyword(s):  
Carbon Steel ◽  
Corrosion Rate ◽  
Corrosion Behaviour ◽  
Low Carbon Steel ◽  
Exposure Period ◽  
Xrd Analysis ◽  
Quality Parameters ◽  
Corrosion Products ◽  
Steel Pipe ◽  
Low Carbon

This study investigates the corrosion rate and corrosion behavior of carbon steel pipe at constant condensed fluid from a geothermal power plant. The corrosion rate of the steel was determined by weight loss analysis, whereas the corrosivity of the condensate fluids was measured by a multimeter Hach HQ40d. The morphology of the corrosion products formed was characterized by scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), and x-ray diffraction (XRD) analysis. Results showed that the corrosion rate in the liquid part of the condensate fluids is constant during the immersion period when water quality parameters are constant. Meanwhile, the corrosion rate of low carbon steel pipe decreases though with the longer exposure period in the condensate fluid. The decrease of metal corrodibility identical to the lower corrosion rate at a longer exposure time due to the protective corrosion layer formed. The corrosion products during immersion tests identified in the corrosion test were uniform with iron oxide in the form of FeO(OH) and Fe2O3*H2O.

scholarly journals KARAKTERISASI KOROSI BAJA PADUAN RENDAH DI LINGKUNGAN 60% LiBr PADA SUHU DIDIH = CORROSION CHARACTERIZATION OF LOW-ALLOY STEEL UNDER 60% LiBr ENVIRONMENT AT BOILING TERMPERATURE

2019 ◽  
Vol 14 (2) ◽  
Author(s):  
Harsisto .
Keyword(s):  
Alloy Steel ◽  
Low Carbon Steel ◽  
Steel Corrosion ◽  
Low Alloy Steels ◽  
Air Conditioner ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Alloy Steels ◽  
Engine Coolant

Research-based characterization of low alloy steel chrome andmanganese is done because of the problem of corrosion and corrosion limit water evenly on low carbon steel. Based on the findings, the engine coolant is switched on-and off every day so there was influence of outside air and the decrease of the temperature to room temperature. Based on the research and discussion of the characteristics of the five types low alloy steel containing 0.5 wt% manganese in the medium 60% LiBr + 0.2% LiOH at a temperature of (150 ± 2) ° C and exposure to atmospheric air for 50 hours and 110 hours , it showed that the corrosion rate is dependent on the level of content of the chromium. In the addition of the chromium in low alloy steels exposed in the test solution, there is no consistency in the natural corrosion potential value, but in general all test objects were in a corroded state.Keywords : air conditioner, low alloy steel, corrosion, LiBr, LiOH, the boiling temperature and the room temperature.AbstrakPenelitian karakterisasi baja paduan rendah berbasis krom dan mangan ini dilakukan karena adanya masalah korosi merata dan korosi batas air pada baja karbon rendah. Berdasar fakta di lapangan,mesin pendingin tersebut dilakukan “on-Off” setiap hari sehingga ada pengaruh udara luar dan turunnya suhu hingga suhu ruangan. Berdasarkan penelitian dan pembahasan tentang karakteristik 5 jenis baja paduan rendah dengan kandungan 0,5% berat unsur mangan dalam media 60% LiBr + 0,2% LiOH pada suhu(150±2) °C dan ekspos udara atmosfer selama 50 jam dan 110 jam, hasilnya menunjukkan bahwa laju korosi masih tergantung pada kadar kandungan unsur krom. Pada penambahan unsur krom dalam baja paduan rendah yang diekspos dalam larutan uji, tidak menunjukkan adanya konsistensi harga potensial korosi alaminya, tetapi secara umum semua benda uji berada dalam keadaanterkorosi.Kata Kunci : mesin pendingin ruangan, baja paduan rendah, korosi, LiBr,LiOH, suhu didih dan suhu ruangan.AbstrakPenelitian karakterisasi baja paduan rendah berbasis krom dan mangan inidilakukan karena adanya masalah korosi merata dan korosi batas air padabaja karbon rendah.Berdasar fakta di lapangan,mesin pendingin tersebut dilakukan “on-Off” setiaphari sehingga ada pengaruh udara luar dan turunnya suhu hingga suhuruangan. Berdasarkan penelitian dan pembahasan tentang karakteristik 5jenis baja paduan rendah dengan kandungan 0,5% berat unsur mangandalam media 60% LiBr + 0,2% LiOH pada suhu(150±2) °C dan ekspos udaraatmosfer selama 50 jam dan 110 jam, hasilnya menunjukkan bahwa lajukorosi masih tergantung pada kadar kandungan unsur krom. Padapenambahan unsur krom dalam baja paduan rendah yang diekspos dalamlarutan uji, tidak menunjukkan adanya konsistensi harga potensial korosialaminya, tetapi secara umum semua benda uji berada dalam keadaanterkorosi.Kata Kunci : mesin pendingin ruangan, baja paduan rendah, korosi, LiBr,LiOH, suhu didih dan suhu ruangan.

The study of spring-back in wipe-bending processes for perforated components

2011 ◽  
Vol 225 (11) ◽  
pp. 2007-2014 ◽  
Author(s):  
M A Farsi ◽  
B Arezoo ◽  
V Alizadeh ◽  
S Mirzaee
Keyword(s):  
Finite Element ◽  
Carbon Steel ◽  
Sheet Metal ◽  
Low Carbon Steel ◽  
High Strength ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Spring Back ◽  
Bending Process ◽  
Component Material

Bending is one of the processes frequently used during manufacturing of sheet-metal components. Spring-back in bending operations is an important issue when producing precision parts. This issue becomes even more important when the component has any kind of hole on the bending surface. Such components are the focus of study in this paper. Many parameters affect spring-back in the bending process; in the present work, perforated components with an oblong cut are selected, and the influence of cut size, die radius, clearance, and component material on the value of the spring-back in a wipe-bending process are studied. Four different hole sizes, three die radii and clearance, and two different steel materials (high-strength low-alloy steel and low-carbon steel) are used in experiments and finite-element simulations. Results show these parameters have effect on the amount of spring-back in the wipe-bending process.

Hysteretic Features of Low Yield Point Steel and its Influence on Shear Plate Damper Behavior

2018 ◽  
Vol 763 ◽  
pp. 718-725
Author(s):  
Qun He ◽  
Yi Yi Chen ◽  
Wei Wang ◽  
Hai Tian
Keyword(s):  
Carbon Steel ◽  
Yield Point ◽  
Loading Condition ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Low Alloy Steel ◽  
Cyclic Loading Condition ◽  
Cyclic Tension ◽  
Shear Plate ◽  
Tension And Compression

The hysteretic features of low yield point steel LYP100 is experimentally studied by using very short coupons under cyclic tension and compression till to the strain amplitude of ±8%. The features of this steel are compared with commonly used low carbon steel and low alloy steel in structural construction. It is shown that with the increase of strain amplitudes under cyclic loading condition the hardening effect is more distinguished in the case of LYP steel than that of the commonly used structural steel. When the shear plate damper is made of LYP steel, its behavior is largely affected by the material hysteretic features.

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