Protection of metals or metal containing articles

Claim 3

The method of claim 1 wherein said metal items are selected from metal coated items, metal containing items, and solid metal items.

Claim 4

The method of claim 2 wherein said metal of said metal items is selected from silver, copper, and lead.

Claim 5

The method of claim 3 wherein said metal is silver.

Claim 6

The method of claim 1 wherein the enclosure will not permit replacement of air within the enclosure at a rate greater than 20 times per day under stable conditions.

Claim 7

The method of claim 1 wherein the black sorbent foam is present within the enclosure in a ratio of foam to gas volume within the enclosure of at least 3.5 g/m 3 .

Claim 8

An enclosure for the protection of metal items which are susceptible to corrosion by acid vapors comprising a structure which confines gas sufficiently so as to not allow free flow of gas from the enclosure to the environment under stable conditions, said enclosure containing a black sorbent thermoset foam material made by the pyrolysis of a composition liquid at the pyrolysis temperature said composition comprising at least one aromatic nitrogen containing compound having the formula: X -- Ar -- Y wherein Ar represents an aromatic nucleus, X represents a substituent having a negative Hammett sigma constant and attached to the aromatic nucleus by a nitrogen, oxygen, or sulfur atom which forms a part of said X substituent, and Y represents a substituent having a positive Hammett sigma constant and attached to the aromatic nucleus by a nitrogen atom which forms a part of said Y substituent, the substituents X and Y being either directly attached to the aromatic nucleus, or directly attached to a ring fused to the aromatic nucleus, the sorbent thermoset foam having a specific surface area of at least 50 m 2 /g, and said pyrolysis comprising heating said composition to initiate reaction of the said composition.

Claim 9

An enclosure for the protection of metal items which are susceptible to corrosion by acid vapors comprising a structure which confines gas sufficiently so as to not allow free flow of gas from the enclosure to the environment under stable conditions, said enclosure containing a black sorbent thermoset foam material made by the pyrolysis of a composition liquid at the pyrolysis temperature said composition comprising at least one aromatic nitrogen containing compound having the formula: X -- Ar -- Y wherein Ar represents an aromatic nucleus, X represents a substituent having a negative Hammett sigma constant and attached to the aromatic nucleus by a nitrogen, oxygen, or sulfur atom which forms a part of said X substituent, and Y represents a substituent having a positive Hammett sigma constant and attached to the aromatic nucleus by a nitrogen atom which forms a part of said Y substituent, the substituents X and Y being either directly attached to the aromatic nucleus, or directly attached to a ring fused to the aromatic nucleus, the sorbent thermoset foam having a specific surface area of at least 50 m 2 /g, and said pyrolysis comprising heating said composition to initiate reaction of the said composition.

Claim 10

The enclosure of claim 7 further containing at least one of silver, copper, or lead which is to be protected from corrosion.

Claim 11

The enclosure of claim 7 further containing silver which is to be protected from corrosion.

Claim 12

The enclosure of claim 7 wherein the enclosure will not permit replacement of air within the enclosure at a rate greater than 20 times per day under stable conditions.

Claim 13

The enclosure of claim 7 wherein the enclosure contains said black sorbent foam material in a ratio of foam to volume of gas within the enclosure of at least 3.5 g/m 3 .

Claim 14

The method of claim 1 wherein X and Y are directly attached to said aromatic nucleus.

Claim 15

The enclosure of claim 7 wherein X and Y are directly attached to said aromatic nucleus.