Abstract This article presents a compositional analysis of metal artifacts from the Postclassic period ( a.d. 1100–1450) city Mayapan, Yucatan, Mexico. We document metallurgical production at R-183, an elite residential group and one most significant archaeological contexts associated with metalworking Mayapan. Salvage excavations in 1998 recovered small cache containing 282 copper bells, two m...

Metalworking fluids have the ability to extend cutting tool life and improve machinability of materials. There is a need for development reliable machining tests which can be used screen with high confidence allow ranking in terms performance. This study developed novel methodology utilizing single-point milling evaluate fluid performance wear forces across various aerospace alloys. The repeata...

UNLABELLED The present study is a part of a larger project on assessment of exposure to biological agents and respiratory health effects among metal workers. OBJECTIVES The aim of this study was to evaluate the level of microbial contamination of metalworking coolants as a potential source of harmful biological agents in three different metal industry plants in Poland. MATERIAL AND METHODS ...

The microbial contamination of water miscible metalworking fluids (MWFs) is a serious problem in metal industry. A good maintenance of MWF re-circulation systems can extend the lifetime of coolants and ensure the quality of the tools produced. In MWFs, as in the other water-based environments, microorganisms usually live in the form of biofilms, the communities of bacteria and fungi attached to...