OptoSurf® Measurement Technology for Use on Surfaces of Historic Buildings and Monuments Cleaned by Laser

Weinhold, Wolfgang P.; Wortmann, Andreas; Diegelmann, C.; Pummer, Erich; Pascua, N.; Brennan, Th.; Burkhardt, R.; Goretzki, L.

doi:10.1007/978-3-540-72130-7_70

Cited by 2 publications

(1 citation statement)

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“…Surface morphology is referred in this paper as "roughness": "Ra", which is the arithmetic average of all roughness values over a testing distance; Rq, also known as the root-mean-square or RMS-roughness value, provided the geometrical average of those values; and Rz represented the average distance between the highest peak and the deepest valley along the testing distance ( Weinhold and Pummer, 2008;Weinhold et al, 2005 ). After coating, roughness was measured for each sample at three locations with a non-contact mobile surface topography system ( TRACEiT w , from Innowep GmbH, Germany).…”

Section: Surface Morphologymentioning

confidence: 99%

The effect of parylene coating for restoration of gold foil on Dazu Grottoes

Xia

Zhang

et al. 2013

Anti-Corrosion Methods and Materials

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Purpose -The aim of this study was to investigate the effectiveness of restoration of gold foils on Dazu Grottoes using different parylene coatings. Design/methodology/approach -The gold foil samples were applied with two types of parylene coating with six different thicknesses, C-10, C-15, C-20, N-10, N-20, N-25, respectively. Electrochemical impedance, surface morphology, and hydrophobicity properties were used to examine the behavior of the coatings. Findings -The results showed that an increase in electrochemical corrosion resistance was observed as the degree of coating thickness was increased for both C-parylene and N-parylene coatings. In addition, the surface morphology study, using 3D topography measurement, indicated that the surface roughness was decreased for all parylene coatings. Furthermore, the parylene-C coating was comparatively more effective than was the parylene-N coating. Originality/value -The results obtained from the three methods were in close agreement. This is an indication that the parylene-C coating can be used to restore the gold foils on Dazu Grottoes and to support future restoration and consolidation to be applied on site on the Grottoes.

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Section: Surface Morphologymentioning

confidence: 99%

The effect of parylene coating for restoration of gold foil on Dazu Grottoes

Xia

Zhang

et al. 2013

Anti-Corrosion Methods and Materials

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Unobvious geoheritage in sacral buildings: millstones in churches of NE Poland from a geological and geomorphological perspective

Czubla,

Brykała,

Dąbski

et al. 2024

Geogr. Pol.

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The article highlights the importance of medieval churches with embedded millstones as geocultural objects with a great geotouristic and educational potential. In the lowland areas of Northeastern Poland, 79 millstones and their semi-finished products were inventoried. Their sizes ranged from 70 to 100 cm in diameter. The majority of them were made of erratic boulders, mainly granitoids of Fennoscandian origin. Additionally, gneisses, sandstones, pegmatites, and basaltoid were also identified. An attempt was made to determine the degree of weathering of the millstones over several hundred years of exposure to external conditions. Measurements of moisture content and salinity of the walls surrounding 10 millstones embedded in the walls of 8 churches were taken three times (in spring, summer, and winter). Lower wall moisture was observed in the vicinity of the millstones, but only in the case of three walls, the salinity of the mortar binding the bricks and stones was at a low level. A weak but statistically significant negative correlation was found between the age of the churches and the hardness of the millstones measured with a Schmidt hammer.

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OptoSurf® Measurement Technology for Use on Surfaces of Historic Buildings and Monuments Cleaned by Laser

Cited by 2 publications

References 0 publications

The effect of parylene coating for restoration of gold foil on Dazu Grottoes

The effect of parylene coating for restoration of gold foil on Dazu Grottoes

Unobvious geoheritage in sacral buildings: millstones in churches of NE Poland from a geological and geomorphological perspective

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