EU-Serbia-Romania Cross-border Cooperation on Ecologic Filler Alloys for Soldering

This project, funded by the European Union Structural Funds 2007-2013, involves a collaboration between the Serbian and Romanian governments to develop new ecologic filler alloys for soldering. The initiative aims to promote the use of non-ferrous ores from the Romanian-Serbian cross-border area to create low melting ecological solder alloys based on tin and indium. These innovative alloys offer a lead-free and cadmium-free alternative, addressing the requirements of WEEE and RoHS regulations. The project explores different compositions of tin, silver, and indium to find suitable replacements for traditional lead solders, with a focus on creating alloys with improved features and melting points.

• EU
• Serbia
• Romania
• soldering alloys
• cross-border cooperation

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1. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA Romania Republic of Serbia IPA Cross-border Cooperation Programme Promoting new ecologic filler alloys for soldering, based on the non-ferrous ore of the Romanian-Serbian cross-border area ECOSOLDER Common borders. Common solutions.

2. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA Romania Republic of Serbia IPA Cross-border Cooperation Programme LOW MELTING ECOLOGICAL SOLDER ALLOYS BASED ON TIN AND INDIUM Dr A.Milosavljevic, Dr A.Kostov, Eng R.Todorovic Mining and Metallurgy Institute Bor SERBIA Common borders. Common solutions.

3. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA INTRODUCTION AND REQUIREMENTS FIND A SUBSTITUTE FOR COMMON SOLDERS LEAD-FREE CADMIUM FREE WEEE AND ROHS Common borders. Common solutions.

4. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA INTRODUCTION AND REQUIREMENTS 48Sn52In the lowest melting point (118 C) 96.5Sn3.5Ag high melting temperature Binary solder alloys do not satisfy some features, so alloys based on tin with addition of silver and indium may be the proper solution for replacement lead solders Common borders. Common solutions.

5. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA INITIAL DATA FOR Sn-In-Ag ALLOYS alloy Xi at % Sn In Ag Sn In Ag L1 0.5 0.35 0.15 50 35 15 L2 0.6 0.28 0.12 60 28 12 L3 0.7 0.21 0.09 70 21 9 L4 0.8 0.14 0.06 80 14 6 L5 0.9 0.07 0.03 90 7 3 Common borders. Common solutions.

6. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA Sn-In-Ag ALLOYS METALOGRAPHY L1 L2 L3 Sn50In35Ag15 200x Sn60In28Ag12 125x Sn70In21Ag9 125x Common borders. Common solutions.

7. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA INVARIANT REACTIONS IN Ag-In-Sn SYSTEM Composition of liquid phase Sn-1,9In-3,9Ag Reaction Temperature, K L+Ag3Sn L+(Sn) (Sn)+ 500 + 482 Sn-6,8In-3,3Ag L+ +Ag2In +Ag2In +AgIn2 + +Ag2In 453 Sn-25,5In-2,5Ag L+(In) 408 Sn-84,6In-1,3Ag L+Ag2In L 392 Sn-61,1In-1,0Ag 387 Sn-52,2In-0,9Ag Common borders. Common solutions.

8. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA VERTICAL PROJECTION FOR Sn-In-Ag SYSTEM A1-Ag10In18Sn72 B1-Ag10In30Sn60 C1-Ag10In45Sn45 Common borders. Common solutions.

9. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA SUMMARY ECOLOGICAL SOLDER ALLOYS BASED ON TIN AND INDIUM ARE SUITABLE ADITION OF SILVER TO Sn-In BINARY ALLOY The most suitable are alloys with high percent of tin, and with low content of indium and silver Common borders. Common solutions.

10. EUROPEAN UNION Structural Funds 2007-2013 SERBIAN GOVERNMENT GOVERNMENT OF ROMANIA Thank you for your attention! Common borders. Common solutions.