Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
METHOD FOR MANUFACTURING WATER SUPPLY EQUIPMENT MADE OF COPPER ALLOY IN FAUCET METAL FITTING OR VALVE
PROBLEM TO BE SOLVED: To provide a method for manufacturing water supply equipment which contains antimony, improves dezincification resistance and stress corrosion crack resistance and suppresses elution of lead, while suppressing an adverse effect on tap water by suppression of a leaching amount of antimony and preventing elution of lead, when water supply equipment made of a copper alloy in a faucet metal fitting or a valve and a liquid-contact component thereof is manufactured by using a brass alloy excellent in manufacturability, antifungal properties, recyclability and economical efficiency.SOLUTION: A ratio in a liquid-contact area of a brass alloy component containing antimony constituting water supply equipment is reduced so as not to exceed a water quality allowable limit value corresponding to water quality allowable limit characteristics of antimony derived from a correlation between a liquid-contact area of the water supply equipment and an antimony content of a brass alloy forming the water supply equipment, the liquid-contact part of the brass alloy of the water supply equipment is cleaned and lead is removed to form a film, thereby a liquid-contact part surface layer is deleaded, and the antimony and lead leached from the water supply equipment to tap water are suppressed to the water quality allowable limit value or less.SELECTED DRAWING: Figure 1
【課題】製造性、抗菌性、リサイクル性、及び経済性に優れた黄銅合金により水栓金具又はバルブとそれらの接液部品における銅合金製給水器材を製造したときに、アンチモンを含有させて耐脱亜鉛性や耐応力腐食割れ性を向上と鉛の溶出を抑制しつつ、このアンチモンの浸出量を抑えかつ鉛の溶出を防ぐことで水道水に与える悪影響を抑えた給水器材の製造方法を提供することにある。【解決手段】給水器材の接液面積とこの給水器材を成す黄銅合金のアンチモン含有量との相関関係から導出されるアンチモンの水質許容限界特性に対応させて、水質許容限界値を超えないように、給水器材を構成するアンチモンを含有する黄銅合金部品の接液面積に占める割合を減じるとともに、給水器材の黄銅合金の接液部を洗浄して鉛を除去し被膜を形成することで接液部表面層を脱鉛化して、給水器材から水道水に浸出するアンチモンおよび鉛を水質許容限界値以下に抑えるようにした。【選択図】図１
METHOD FOR MANUFACTURING WATER SUPPLY EQUIPMENT MADE OF COPPER ALLOY IN FAUCET METAL FITTING OR VALVE
PROBLEM TO BE SOLVED: To provide a method for manufacturing water supply equipment which contains antimony, improves dezincification resistance and stress corrosion crack resistance and suppresses elution of lead, while suppressing an adverse effect on tap water by suppression of a leaching amount of antimony and preventing elution of lead, when water supply equipment made of a copper alloy in a faucet metal fitting or a valve and a liquid-contact component thereof is manufactured by using a brass alloy excellent in manufacturability, antifungal properties, recyclability and economical efficiency.SOLUTION: A ratio in a liquid-contact area of a brass alloy component containing antimony constituting water supply equipment is reduced so as not to exceed a water quality allowable limit value corresponding to water quality allowable limit characteristics of antimony derived from a correlation between a liquid-contact area of the water supply equipment and an antimony content of a brass alloy forming the water supply equipment, the liquid-contact part of the brass alloy of the water supply equipment is cleaned and lead is removed to form a film, thereby a liquid-contact part surface layer is deleaded, and the antimony and lead leached from the water supply equipment to tap water are suppressed to the water quality allowable limit value or less.SELECTED DRAWING: Figure 1
【課題】製造性、抗菌性、リサイクル性、及び経済性に優れた黄銅合金により水栓金具又はバルブとそれらの接液部品における銅合金製給水器材を製造したときに、アンチモンを含有させて耐脱亜鉛性や耐応力腐食割れ性を向上と鉛の溶出を抑制しつつ、このアンチモンの浸出量を抑えかつ鉛の溶出を防ぐことで水道水に与える悪影響を抑えた給水器材の製造方法を提供することにある。【解決手段】給水器材の接液面積とこの給水器材を成す黄銅合金のアンチモン含有量との相関関係から導出されるアンチモンの水質許容限界特性に対応させて、水質許容限界値を超えないように、給水器材を構成するアンチモンを含有する黄銅合金部品の接液面積に占める割合を減じるとともに、給水器材の黄銅合金の接液部を洗浄して鉛を除去し被膜を形成することで接液部表面層を脱鉛化して、給水器材から水道水に浸出するアンチモンおよび鉛を水質許容限界値以下に抑えるようにした。【選択図】図１
METHOD FOR MANUFACTURING WATER SUPPLY EQUIPMENT MADE OF COPPER ALLOY IN FAUCET METAL FITTING OR VALVE
水栓金具又はバルブにおける銅合金製給水器材の製造方法
SUGAYA TETSUKAZU (Autor:in)
25.10.2018
Patent
Elektronische Ressource
Japanisch
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