3526. Welding Composition

3526.     Welding Composition. Fuse borax with 1/16 its weight sal-ammoniac, cool, pulverize, and mix with an equal weight of quicklime, when it is to be sprinkled on the red hot iron and the latter replaced in the fire.

3527. Welding Composition

3527.   Welding Composition. Take 15 parts borax, 2 of sal-ammoniac, and 2 of prus-siate of potash. Being dissolved in water, the water should be gradually evaporated at a low temperature.

3528. Welding Composition

3528.    Welding Composition. Mix 10 parts borax with 1 part sal-ammoniac; fuse

1.

—80

parts

zinc,

8

parts

copper,

12

parts

aluminum.

2.

—85

"

"

6

"

"

9

"

"

3.

—88

"

"

5

"

"

7

"

"

4.

—90

"

"

4

"

"

6

"

"

5.

—94

"

"

2

"

"

4

"

"

3529. Compound for Welding Steel

3529.    Compound for Welding Steel. The following composition is said to be superior to borax for welding steel. Mix coarsely powdered borax with a thin paste of Prussian blue; then let it dry. The combination seems to be a rational one.

3530. Antimonoid

3530.    Antimonoid. A welding powder, named antimonoid, has been in use for some time past in Germany, and found to be of great efficiency. The formula for its preparation has, until lately, been kept a secret; it consists of 4 parts iron turnings, 3 parts borax, 2 parts borate of iron, and 1 of water.

3531. Fluxes for Soldering and Welding

3531. Fluxes for Soldering and Welding.

For Iron or steel............Borax or sal-ammoniac.

«« Tinned iron............Resin or chloride of zinc.

" Copper and brass.......Sal-ammoniac or chloride

" Zinc....................Chloride of zinc, [of zinc.

" Lead...................Tallow or resin.

" Lead and tin pipes......Resin and sweet oil.