The results of investigations, carried out since 1998, of surface tension by the maximum bubble pressure method, and of density by the dilatometric method for pure metals, binary and multicomponent systems have been used to create an electronic database SURDAT of materials for lead-free solders. The database enables also to compare the experimental data of surface tension with the values calculated from Butler's relation and with the literature data of other authors. The base was published at the beginning of the year 2007 as a monograph including the installation program and may by obtained free from the website www.imim.pl. The present version of the SURDAT database will be introduced on the website of the National Institute of Standards and Technology (NIST) together with the new version of Lead-Free Solders base elaborated by NIST. The work on the database is continued. The SURDAT database will be supplemented with new data of surface tension and density for systems already available in the base as well as for new systems and it will be extended by including the results of meniscographic investigations. In the paper there has been offered the instruction for preparing the data for the authors of studies who would like to present the results of their experimental investigations in the SURDAT database.
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