scholarly journals Restoration investigation of paint systems of steel structure of Main railway Prague

2019 ◽  
Vol 63 (1) ◽  
pp. 11-18
Author(s):  
H. Geiplová ◽  
L. Mindoš ◽  
J. Mrázek ◽  
D. Majtás ◽  
P. Macová ◽  
...  
Keyword(s):  
Surface Treatment ◽  
Steel Structure ◽  
Water Jet ◽  
Paint System ◽  
Railway Station ◽  
Xrf Analysis ◽  
Wrought Iron ◽  
Paint Systems

Abstract The paper follows the paper describing the condition of wrought iron structure of main railway station [1]. In this paper the investigation of condition of paint system corrosion surface treatment is given and the restoration procedure is described. The withdrawal samples of paint systems were analysed by stratigraphy, FTIR and XRF analysis. Due to identification of Pb pigment presence in primer the water jet technology was chosen which minimalised the danger waste formation.

Test Study on Anti-Sliding Coefficient of Friction-Type High-Strength Bolt Connectors

2012 ◽  
Vol 166-169 ◽  
pp. 123-126
Author(s):  
Huai Nian Xing ◽  
Xiao Peng Zhang ◽  
Zeng Li Liu ◽  
Li Qiang Jin
Keyword(s):  
Surface Treatment ◽  
Steel Wire ◽  
Steel Structure ◽  
High Strength ◽  
Treatment Method ◽  
General Description ◽  
Plate Surface ◽  
Design Standards ◽  
High Strength Bolt ◽  
Test Study

Friction-type high-strength bolt connectors are widely used in steel structure. However there has only general description for connection plate surface treatment method in the current Chinese design standards. Some research tests have been designed for different connection plate surface treatment method, which include different painting thickness and different blasting method. The results show that different treatment method has different anti-sliding coefficient. The anti-sliding coefficient would decrease with the surface coating thickness increase. The anti-sliding coefficient would less than 0.50 which the Chinese design standard required when some surface treatment methods are used, such as using steel wire section or using mixture of steel wire section and steel shot to sand blasting. So procedure qualification test is necessary to guide processing in order to ensure the quality of the products. It has certain conference value for practical engineering.

Analysis of Wrought Iron Metal Part of Cupola Construction in the Main Railway Station Plzeň from 1907

2017 ◽  
Vol 270 ◽  
pp. 271-278
Author(s):  
Miroslava Matějová ◽  
Růžena Fikrlová ◽  
Josef Kasl
Keyword(s):  
Steel Production ◽  
Metallographic Analysis ◽  
Art Nouveau ◽  
Metal Part ◽  
Vertical Column ◽  
Railway Station ◽  
Production Methods ◽  
Wrought Iron ◽  
Individual Bands ◽  
The 19Th Century

The paper describes the metallographic analysis of a metal part from the cupola construction in the Main Railway Station in Pilsen. The station in the Art Nouveau style was completed in 1907. The part was screwed to a vertical column and used as a pulley, probably for the transport of other parts. The cross-section consisted of visible bands. The microstructure was heterogeneous, formed by connected individual bands, ferritic structure predominated, but in some bands it was ferritic - pearlitic. The structure contained both minor inclusions and complex elongated inclusions consisting of grains and binder - their composition was determined by ED microanalysis. The analysis showed that it is a wrought (puddled) iron with a considerable amount of slag, which was produced with technology used in the 19th century. However, at the beginning of the 20th century, modern steel production methods were used for profiles and thus it is unclear whether this screwed part for manipulation represents the whole construction.

scholarly journals Potential of Using Water Jet Peening as a Surface Treatment Process for Welded Joints

2016 ◽  
Vol 149 ◽  
pp. 472-480 ◽  
Author(s):  
Madhulika Srivastava ◽  
Rupam Tripathi ◽  
Sergej Hloch ◽  
Somnath Chattopadhyaya ◽  
Amit Rai Dixit
Keyword(s):  
Surface Treatment ◽  
Welded Joints ◽  
Treatment Process ◽  
Water Jet

scholarly journals Ultrasonic Pulsating Water Jet Peening: Influence of Pressure and Pattern Strategy

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6019
Author(s):  
Gabriel Stolárik ◽  
Akash Nag ◽  
Jana Petrů ◽  
Jaroslava Svobodová ◽  
Sergej Hloch
Keyword(s):  
Surface Roughness ◽  
Surface Treatment ◽  
Water Jet ◽  
Water Droplets ◽  
Research Attention ◽  
Subsurface Layers ◽  
Thermal Influence ◽  
Pulsating Water Jet ◽  
Clear Increase ◽  
Mechanical Surface

Peening techniques are nowadays attracting more research attention due to their association with the extending of the service life and improving surface texture of engineering components. Ultrasonic pulsating water jet peening represents a new way of mechanical surface treatment. Accelerated water droplets via hammer effect cause small elastic-plastic deformations on the surface. This work deals with peening of aluminum alloy using an ultrasonic pulsating water jet, where periodically acting water droplets were used as the peening medium. The aim of the work was the feasibility study of the peening process and to observe the effects of pressure (p = 10, 20 and 30 MPa) and pattern trajectory (linear hatch and cross hatch). The peened surfaces were analyzed by the surface roughness profile parameters Ra and Rz and the microhardness along the peening axis into the material. Graphically processed results show a clear increase of measured values with increasing pressure (p = 10, 20 and 30 MPa), where the roughness values ranged from 1.89 µm to 4.11 µm, and the microhardness values ranged from 43.3 HV0.005 to 47 HV0.005, as compared to 40.3 HV0.005 obtained for the untreated sample. The achieved results indicate potential using of an ultrasonic pulsating water jet as a new method of surface treatment of metals. By controlled distribution of water droplets, it is possible to achieve a local distribution of surface roughness, and at the same time, strengthening of the subsurface layers in the material without thermal influence on the material.

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