English to Spanish Tech/Engineering Engineering: Industrial refrigeration

Son instrucciones para el técnico al tratar de solucionar un problema en el compresor de un refrigerador. Oración completa: "If there is metal beading located on one or more pins do not attempt to file down the pin."
Explicación del cliente: Beading is caused by arching and there are 3 pins on a compressor terminal for electrical connection. "Beading" would be residual material left on the connector after an arcing condition, a kind of weld slag. Sólo se me ocurre "escorias de metal".