Cements for Iron

I

To make a good cement for iron on iron, make a thick paste, with water, of powdered iron, 60 parts; sal ammoniac, 2 parts, and sulphur flowers, 1 part. Use while fresh.

II

Sulphur flowers, 6 parts; dry white lead 6 parts, and powdered borax, 1 part. Mix by sifting and keep as a dry powder in a closed tin box. To use, make into a thin paste with strong sulphuric acid and press together immediately. This cement will harden in 5 days.

III

Graphite......... 50 pounds

Whiting......... 15 pounds

Litharge......... 15 pounds

Make to a paste with a boiled oil.

IV

Make a paste of white lead and asbestos.

V

Make a paste of litharge and glycerine. Red lead may be added. This also does for stone.

VI

Make a paste of boiled oil of equal parts of white lead, pipe clay, and black oxide of manganese.

VII

Make iron filings to a paste with water glass. VIII.—Sal ammoniac.... 4 ounces

Sulphur......... 2 ounces

Iron filings....... 32 ounces

Make as much as is to be used at once to a paste with a little water. This remark applies to both the following dry recipes:

IX

Iron filings...... 160 ounces

Lime........... 80 ounces

Red lead........ 16 ounces

Alum........... 8 ounces

Sal ammoniac... 2 ounces

X

Clay...........     10 ounces

Iron filings......       4 ounces

Salt............       1 ounce

Borax..........       1 ounce

Black oxide of manganese ... 2 ounces

XI

Mix:

Iron filings......   180 ounces

Lime...........     45 ounces

Salt............       8 ounces

XII

Mix:

Iron filings......   140 ounces

Hydraulic lime . .     20 ounces

Sand...........     25 ounces

Sal ammoniac. . .       3 ounces

Either of these last two mixtures is made into a paste with strong vinegar just before use.

XIII

Mix equal weights of zinc oxide and black oxide of manganese into a paste with water glass.

XIV

Copal varnish, 15 parts; hydrated lime, 10 parts; glue de nerfs (of sinews), 5 parts; fat drying oil, 5 parts; powdered turpentine, 3 parts; essence of turpentine, 2 parts. Dissolve the glue de nerfs on the water bath, add all the other substances, and triturate intimately.

XV

Copal varnish, 15 parts; powdered turpentine, 3 parts; essence of turpentine, 2 parts; powdered fish glue, 3 parts; iron filings, 3 parts; ocher, 10 parts.

XVI

To make a cement for cast iron, take 16 ounces cast-iron borings; 2 ounces sal ammoniac, and 1 ounce sulphur. Mix well and keep dry. When ready to use take 1 part of this powder to 20 parts of cast-iron borings and mix thoroughly into a stiff paste, adding a little water.

XVII

Litharge............   2 parts

Boiled linseed oil.....   2 parts

White lead..........   1 part

Copal..............   1 part

Heat together until of a uniform consistence and apply warm.

XVIII

A cement for iron which is said to be perfectly waterproof and fireproof is made by working up a mixture of equal weights of red lead and litharge with glycerine till the mass is perfectly homogeneous and has the consistency of a glazier's putty. This cement is said to answer well, even for very large iron vessels, and to be unsurpassable for stopping up cracks in large iron pans of steam pipes.