| 摘要 |
PROBLEM TO BE SOLVED: To provide a roof corrosion proofing member for protecting an axial gutter or a valley board from acid rain. SOLUTION: This roof corrosion proofing member C puts a metal plate having high electric potential tendency such as zinc or the like on part where rain water flows down. Namely, acid rain is relaxed by approaching it to a neutral direction with a chemical reaction caused by making the acid rain flow on the zinc or the like. By setting sheet copper or the like so as to bring it into contact with the zinc, a battery action is generated to accelerate the reaction against the acid rain. By the constitution, rain water relaxing acidity greatly reduces corrosion to metal part, and the member can be also used for a long period of time accordingly.
|
