公开(公告)号：US06423208B1

公开(公告)日：2002-07-23

申请号：US09634164

申请日：2000-08-09

Applicant: Larry L. Russell

Inventor： Larry L. Russell

IPC: C23F1300

CPC classification number: C23F13/16 ,  C23F2201/00

Abstract: Control of lead contamination in residential water supplies is accomplished by cathodic protection of lead-containing piping and lead-containing fixtures. Specifically, a partially insulated wire is inserted into lead-containing service lateral piping. Application of a DC current to the partially insulated wire causes the wire to act as an anode and transforms the walls of the pipe into the cathode, thereby protecting against corrosion. Alternatively, a sacrificial anode is inserted into a lead-containing fixture. The electrical potential generated by corrosion of this sacrificial anode transforms the walls of the fixture into a cathode thereby preventing corrosion. Carbonate scaling built-up prior to the initiation of cathodic protection may be removed by temporarily blocking the water pipe and introducing cleaning chemicals.

Abstract translation: 通过对含铅管道和含铅固定装置的阴极保护来控制居民用水中的铅污染。 具体地说，将部分绝缘的线插入含铅服务侧管中。 将直流电流施加到部分绝缘电线上会导致电线充当阳极，并将管壁变形成阴极，从而防止腐蚀。 或者，将牺牲阳极插入含铅夹具中。 由该牺牲阳极的腐蚀产生的电势将固定装置的壁变成阴极，从而防止腐蚀。 在开始阴极保护之前累积的碳酸盐结垢可以通过暂时阻塞水管并引入清洁化学品来消除。