Class Code: 3372

Per NCCI's Scopes Code Description:

Electroplating—Code 3372 applies to the process of placing a decorative or protective metallic coating on metal or other conducting surfaces by the use of electrolysis. The article to be plated is immersed in a solution containing the necessary chemical mixture. An electric current is then passed through the solution. This process deposits a coating of the desired metal on the article. Gold, nickel and chromium are examples of metals that have been used to coat other metals. Electroplating risks will typically engage in substantial finishing operations consisting of cleaning, polishing and buffing the plated articles.

Anodizing metal articles to prevent or retard oxidation is contemplated by Code 3372. This is analogous to electroplating as the articles are placed in an acid solution followed by the application of an electric charge.

Code 3372 is applicable to metal finishing operations such as polishing and buffing small miscellaneous articles of metal, plastic, etc. This work involves castings, plated sheet metal parts, as well as fine articles such as jewelry, silverware and optical frames.

Metal deburring operations are classified to Code 3372. This operation involves the removal of rough edges or areas from metal goods.

Shot peening of metal parts is assigned to Code 3372 by analogy. This work involves bombarding metal parts with steel or glass shot under controlled conditions to improve the surface structure of the metal.

Detinning—this classification applies to entities engaged in recovering or reclaiming tin from tin plate scrap. The methods in general use follow:

Detinning by chemical process—the scrap is treated with a hot solution of caustic soda in the presence of an oxidizing agent. This causes the tin to precipitate from the scrap. The tin is then collected, washed and pressed into bales.

Detinning by electrolysis—this is an additional step in the recovery by chemicals and involves the introduction of an electric current in the chemical solution. This precipitates a purer form of tin than the tin recovered by the exclusive chemical process.

Detinning by chlorine process—this is a variation in the chemical recovery method whereby chlorine is forced under pressure into cylinders containing tin plate scrap. The chlorine dissolves the tin, which is then collected.

State Addendum
Massachusetts Refer to Code 3632 for job shops engaged in the following operations: metal finishing, such as the polishing and buffing of small miscellaneous metal or plastic articles; metal deburring; and the shot peening of metal parts.

Rate per $100. of Renumeration: $ 2.07

Construction Exemption Required: No