Influence of a CuS04 Treatment on Atmospheric Steel Rust Formation a Mössbauer Spectroscopy Study

CORROSION ◽  
1982 ◽  
Vol 38 (4) ◽  
pp. 206-211 ◽  
Author(s):  
C. Saragovi-Badler ◽  
I. A. Maier ◽  
F. Labenski
Keyword(s):  
Copper Deposit ◽  
Steel Plates ◽  
Weathering Steel ◽  
Spectroscopy Study ◽  
Spectroscopy Analysis ◽  
Amorphous Substance ◽  
Significant Difference ◽  
Amorphous Compound ◽  
Industrial Atmosphere

Abstract Mössbauer spectroscopy has been used to analyze the rust layers formed on a weathering steel and a 1010 steel exposed for 10-1/2 months to an urban-industrial atmosphere. No significant difference was found comparing the rusts of both steels: they were composed by γ-FeOOH, superparamagnetic α-FeOOH, and an amorphous or gel-like compound. γ-FeOOH is more abundant in the internal rust layers, whereas the amount of α-FeOOH and the amorphous compound increase in the external rusts. Part of the samples received an initial copper deposit by immersion of the steel plates in a CuSO4 bath. Mössbauer spectroscopy analysis showed that the amorphous substance was no longer present in the rusts of those specimens; that is, the rusts of both steels were formed only by γ-FeOOH and α-FeOOH.

Accelerated corrosion behavior of weathering steel Q345qDNH for bridge in industrial atmosphere

2021 ◽  
Vol 306 ◽  
pp. 124864
Author(s):  
Jun-dong Fu ◽  
Shui Wan ◽  
Ying Yang ◽  
Qiang Su ◽  
Wen-wen Han ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Weathering Steel ◽  
Accelerated Corrosion ◽  
Industrial Atmosphere

Microstructure and Mechanical Properties of Extra High Strength Heavy Steel Plate for Bridge Application

2014 ◽  
Vol 783-786 ◽  
pp. 859-866 ◽  
Author(s):  
Dong Sheng Liu ◽  
Chong Xiang Yue ◽  
Huan De Chen ◽  
Bing Gui Cheng
Keyword(s):  
Mechanical Properties ◽  
Arc Welding ◽  
Steel Plate ◽  
Control Process ◽  
High Strength ◽  
Submerged Arc Welding ◽  
Steel Plates ◽  
Weathering Steel ◽  
Weld Joints ◽  
Submerged Arc

Key parameters for thermomechanical control process (TMCP) and integrated welding operations have been determined to industrialize extra high strength micro-alloyed low carbon SiMnCrMoNiCu steel plates for bridge applications. Confocal Scanning Microscope was used to make In-situ observation on austenite grain growth during reheating. A Gleeble 3800 thermomechanical simulator was employed to investigate transformation behavior of the TMCP conditioned austenite. Integrated industrial rolling trial was conducted to correlate the laboratory observations and commercial production of the plates. Microstructure factors affecting the toughness of the steel were analyzed. Submerged-Arc Welding (SMAW) trails were conducted and the structures and mechanical properties of the weld joints characterized. The representative plate with thickness of 60 mm consisted of acicular ferrite (AF) + refined polygonal ferrite (PF) + granular bainite (GB) across the entire thickness section exhibit yield strength (YS) greater than 560 MPa in transverse direction and excellent Charpy V Notch (CVN) impact toughness greater than 100 J at-40 °C in the parent metal and the weld joints. These provide useful integrated database for producing advanced high strength steel plates via TMCP. Keywords: Thermo-Mechanical Control Process;Weathering Steel Plate for Bridge; Submerged-Arc Welding without Preheating

TIME REQUIRED TO RINSE AND CLEAN RAW MILK FROM STAIN LESS STEEL PLATES WITH SOLUTIONS AT 35 C1,2

1972 ◽  
Vol 35 (6) ◽  
pp. 332-334
Author(s):  
M. E. Anderson ◽  
J. R. Fischer ◽  
R. T. Marshall ◽  
D. B. Brooker ◽  
T. F. Webb
Keyword(s):  
Stainless Steel ◽  
Skim Milk ◽  
Raw Milk ◽  
Steel Plates ◽  
Significant Difference ◽  
Time Required ◽  
Type Apparatus ◽  
Detergent Solutions

Stainless steel plates were soiled with milk and skim milk, and the films were dried before being rinsed or rinsed and cleaned in a spray-type apparatus. Rinsing was practically completed after 30 sec and cleaning after 1 min of spraying. There was no significant difference in amounts of soil remaining on plates which had been sprayed for 17 min with detergent solutions tempered to either 35 or 62.8 C.

Improvement of mechanical and physical performance of poly (lactic acid) biocomposites by application of surface silanization for huntite–hydromagnesite mineral

2020 ◽  
pp. 089270572093077 ◽  
Author(s):  
Ali Sinan Dike
Keyword(s):  
Tensile Strength ◽  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Spectroscopy Analysis ◽  
Melt Flow Rate ◽  
Impact Performance ◽  
Significant Difference ◽  
Strong Adhesion ◽  
Maximum Improvement ◽  
Loading Ratio

Silanization process was applied to huntite–hydromagnesite (HH) mineral in for improve its adhesion to poly (lactic acid) (PLA) matrix. Surfaces of HH samples were examined by infrared spectroscopy and energy-dispersive X-ray spectroscopy analysis. HH was compounded with PLA using melt-blending technique. Modified HH incorporations led to nearly 19% and 20% increase in tensile strength and modulus of PLA, respectively. The maximum improvement for tensile strength value is obtained for 15 wt% of modified HH containing composite sample. On the other hand, percentage strain of PLA decreases nearly 22% with the addition of HH. Silane-modified HH-containing composites yield higher impact energy compared to untreated HH. Impact performance of composites increases nearly 18% with the increase in loading ratio of HH. Silane-modified HH displays higher storage modulus than HH, and glass transition temperature of PLA shifts to higher levels with the inclusion of HH. HH-filled composites exhibit no significant difference with melt flow rate value of PLA. Water resistance of silane-treated HH-containing composites are found to be higher than untreated HH attribitued to hydrophobicity of silicon-rich surface. Accordingly, composites that include modified HH are suitable for outdoor applications. Morphological investigations confirm that dispersion homogeneity and strong adhesion are achieved due to the improvement of surface interactions between HH and PLA phases after silane treatment process.

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