Ultrasonic measuring method for spraying thickness of protective coating on steel structure

2021 ◽  
Author(s):  
Zhigang Wang ◽  
Haitao Wang ◽  
Dexiu Dong ◽  
Jiahui Sheng ◽  
Qiufeng Li ◽  
...  
Keyword(s):  
Protective Coating ◽  
Steel Structure ◽  
Measuring Method ◽  
Ultrasonic Measuring

scholarly journals Gas Evolution Rates of Graphite Protective Coatings in Dependence on the Applied Solvent and Kind of Atmosphere

2016 ◽  
Vol 61 (4) ◽  
pp. 2129-2134
Author(s):  
A. Kmita ◽  
D. Drożyński ◽  
J. Mocek ◽  
A. Roczniak ◽  
J. Zych ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Protective Coating ◽  
Protective Coatings ◽  
Measuring Method ◽  
Gas Evolution ◽  
Casting Method ◽  
Air Atmosphere ◽  
Two Systems ◽  
Mould Cavity

Abstract The results concerning emission of gases from two commercial graphite protective coatings for moulds and cores (water and alcoholic) are given in the hereby paper. Investigations were performed in two systems. One of the systems was corresponding to conditions occurring inside the mould cavity immediately after its pouring with liquid metal (Method 1), while the second was simulating conditions deep inside the mould at a certain distance from the casting (Method 2). Investigations were carried out in the CO2 atmosphere and in the air. The water protective coating generated 1.5 to 3 times larger volume of gases than the alcoholic coating (in dependence on the measuring method and atmosphere). The smallest differences occurred in the air atmosphere, while the largest in the CO2 atmosphere.

scholarly journals Cross-sectional analysis of tubular polymer semi-finished products using ultrasound in comparison with other measuring methods

2020 ◽  
Vol 6 (3) ◽  
pp. 151-154
Author(s):  
Olga Sahmel ◽  
Stefan Siewert ◽  
Wolfram Schmidt ◽  
Klaus-Peter Schmitz ◽  
Niels Grabow
Keyword(s):  
Wall Thickness ◽  
Biomedical Engineering ◽  
Measuring Method ◽  
Outer Diameter ◽  
Micro Computed Tomography ◽  
Cross Sectional ◽  
Biodegradable Poly ◽  
Ultrasonic Measuring ◽  
Inner Diameter ◽  
Sectional Analysis

AbstractIn the sector of biomedical engineering and implant technology, high-precision geometry is often decisive for successful end product functionalization. Especially in the production of tubular polymer semi-finished products, e.g. for stent fabrication, it is important to assure the desired parameters, such as inner and outer diameter and wall thickness. Within the current study we analyzed semifinished products for manufacturing of polymeric stents using three different methods. Biodegradable poly-L-lactide (PLLA) tubes were examined by means of micro computed tomography, ultrasonic scanning and scanning electron microscopy. The final evaluation presents clear advantages of the ultrasonic measuring method for the measurement of outer and inner diameter and wall thickness.

scholarly journals Restoration corrosion survey of the steel structure of peron hall of the Main railway station in Prague

2019 ◽  
Vol 63 (1) ◽  
pp. 1-10
Author(s):  
P. Pokorný ◽  
M. Hrabánek ◽  
H. Geiplová
Keyword(s):  
Chemical Composition ◽  
Protective Coating ◽  
Steel Structure ◽  
Corrosion Damage ◽  
Coating System ◽  
Railway Station ◽  
Restoration Project ◽  
Roof Structure ◽  
Current State ◽  
Bearing Structure

Abstract This article presents the results of the corrosion survey of the load-bearing structure of the main hall of the Main railway station in Prague. The chemical composition and microscopy view of the metal alloy has been explored, the current state of the anti-corrosion protection system as well as its composition were also evaluated. The corrosion damage of sheets and reinforcements of individual columns of the peron hall is also reported. The corrosion damage of the plates and reinforcements is locally very significant and is related to the drainage of rain water from the damaged roof structure. Renovation is also necessary for the protective coating system. The article concludes a restoration project that fully respects the historical form of the construction of the early twentieth century with minimal compromise.

scholarly journals Soil–steel structure shell displacement functions based on tensometric measurements

2018 ◽  
Vol 40 (3) ◽  
pp. 170-179 ◽  
Author(s):  
Czesław Machelski
Keyword(s):  
Steel Structure ◽  
Measuring Method ◽  
The Other ◽  
Experimental Measurements ◽  
Electric Resistance ◽  
Static Loads ◽  
Dense Grid ◽  
2D Space ◽  
Displacement Measurements

AbstractThis paper analyses the effects of loads that change their location, i.e. moving but quasi-static loads. Displacements defining the deformation of the soil–steel structure’s shell buried in soil are calculated from the results of measurements performed using a dense grid of points located on the circumferential section of the corrugated plate. In this way, all the components of the structure, namely the corrugated plate, the backfill and the pavement with its foundation, as well as the natural (real) principles of their interaction, are taken into account in the solution. In the proposed algorithm, unit strains are converted into displacements, whereby results as accurate as the ones obtained by direct experimental measurements are obtained. The algorithm’s main advantages are that the number of points is limitless, they are regularly distributed on the circumferential section of the shell and any displacement directions can be obtained. Consequently, the deformations of the shell can be faithfully reproduced. The algorithm’s convenient feature is that one can use a simplified computational diagram of the shell in the form of a beam having the shape of the shell in 2D space (without the other components of the soil–steel structure). The advantage of this measuring method (electric resistance tensometry) is that there is no need to build the solid scaffold used for displacement measurements. The research focuses on the analysis of the displacements and the unit strains arising during the primary and secondary (return) travel of the load.

CAD Of Anticorrosive Protection Of Steel Structures

2019 ◽  
pp. 18-23
Keyword(s):  
Protective Coating ◽  
Computer Aided Design ◽  
Steel Structures ◽  
Cost Effective ◽  
Operating Conditions ◽  
Computational Tool ◽  
Protection Method ◽  
Cost Effective Method ◽  
The Cost ◽  
Aided Design

The choice of cost-effective method of anticorrosive protection of steel structures is an urgent and time consuming task, considering the significant number of protection ways, differing from each other in the complex of technological, physical, chemical and economic characteristics. To reduce the complexity of solving this problem, the author proposes a computational tool that can be considered as a subsystem of computer-aided design and used at the stage of variant and detailed design of steel structures. As a criterion of the effectiveness of the anti-corrosion protection method, the cost of the protective coating during the service life is accepted. The analysis of existing methods of steel protection against corrosion is performed, the possibility of their use for the protection of the most common steel structures is established, as well as the estimated period of effective operation of the coating. The developed computational tool makes it possible to choose the best method of protection of steel structures against corrosion, taking into account the operating conditions of the protected structure and the possibility of using a protective coating.

Periphyton Development on the Protective Coating, Modifiedby the Cation Biocide

2020 ◽  
Vol 56 (1) ◽  
pp. 57-69
Author(s):  
S. P. Rogalskiy ◽  
I. A. Morozovskaya ◽  
M. A. Boretskaya ◽  
T. V. Cherniavskaya ◽  
O. P. Tarasiuk ◽  
...  
Keyword(s):  
Protective Coating

Regeneration of a historic city block: the example of the relocation of the historic Atelier building to the cloister area of the Congregation of the Resurrection in Krakow

2019 ◽  
Vol 63 (1) ◽  
pp. 77-86 ◽  
Author(s):  
Bogusław Podhalański ◽  
Anna Połtowicz
Keyword(s):  
Twentieth Century ◽  
Cultural Heritage ◽  
Steel Structure ◽  
City Block ◽  
Raising Awareness ◽  
Straight Line ◽  
Heritage Buildings ◽  
Heritage Building ◽  
Historic City ◽  
The City

Abstract The article discusses a project that features the relocation of the historic Atelier building, built by Krakow-based architect Wandalin Beringer (1839–1923) who was active in the early twentieth century, and the regeneration of a plot belonging to the Congregation of the Resurrection since 1885, which is located at 12 Łobzowska Street in Krakow. The method includes cutting the entire structure off at the foundation and then after reinforcing it with a steel structure transporting it in its entirety to the new location. The project included two possible variants of moving the building in a straight line, either by 21 or 59 metres and evaluates two projects of further regeneration, the adaptive reuse of the building as an exhibition and religious space as well as a proposal for the remodelling of the nearby plot that belongs to the Congregation into a space for meditation and as a recreational park. The aim of these measures is to prevent the demolition of this building, now over a century old, as a result of which a forgotten element of the cultural heritage of the city will be saved. This project was based on the results of analyses of the cultural and historical conditions of Krakow. The block of buildings in which the Atelier in question is located is a very attractive location, near to the very centre of Krakow, adjacent to residential, service and educational buildings. It is directly adjacent to the Monastery Complex of the Congregation of the Resurrection, listed as a heritage building under conservation protection (municipal registry of heritage buildings). In the second half of the twentieth century, the building was used as a workroom by artists such as Xawery Dunikowski and later by the sculptress Teodora Stasiak. The case of the Atelier may provide an inspiration for discussion as well as raising awareness among citizens and city authorities to avoid future situations in which cultural heritage may become forgotten or demolished.

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