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Determining the Composition of a Two Component Molten Metal Alloy

IP.com Disclosure Number: IPCOM000093994D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Hooser, GE: AUTHOR [+2]

Abstract

This method provides an accurate, simple and rapid mode of periodically determining or continuously monitoring a composition. Such composition can be a molten mixture of two metals having different specific gravities, in particular a molten tin-lead solder.

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Determining the Composition of a Two Component Molten Metal Alloy

This method provides an accurate, simple and rapid mode of periodically determining or continuously monitoring a composition. Such composition can be a molten mixture of two metals having different specific gravities, in particular a molten tin-lead solder.

In various solder operations where the parts to be soldered are dipped in a molten solder bath, the composition of the solder in the bath can vary during operation. This is due to preferential freezing out of one component of the solder. The change in solder composition causes a change in the desired physical properties of the solder, such as solidification or freezing temperature of the solder, which is usually objectionable.

The relative percentage of a two-component, alloy mixture can be calculated when the specific gravity of each of the respective components and the alloy mixture is known. The specific gravities of the pure components can normally be found in the literature. The specific gravity of the molten mixture can be determined by using a hydrometer designed to measure molten metal.

The specific gravity of a lead and tin molten solder mixture can be measured with a hydrometer provided with a weight having a density greater than the density of the molten mixture to be measured. A suitable hydrometer for such measurement adapted to measure specific gravities in the range of 6 to 10 is a PYREX* bulb and stem containing a weight consisti...