| CPC C23C 22/78 (2013.01) [C23C 22/03 (2013.01); C23C 22/73 (2013.01); C23C 22/83 (2013.01); C23C 28/00 (2013.01); C25D 3/04 (2013.01); C25D 3/12 (2013.01); E03C 1/0412 (2013.01)] | 17 Claims |
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1. A sanitary equipment part comprising:
a base material having a metal element at least on a surface thereof;
a layer of metal oxide formed on the surface of the base material; and
a layer of organic compound provided on the layer of metal oxide, wherein
the metal element is at least one selected from the group consisting of Cr, Zr, and Ti,
the layer of metal oxide contains a metal element which is at least one selected from the group consisting of Cr, Zr, and Ti and an oxygen element, and
the layer of organic compound binds to the layer of metal oxide by binding the metal element (M) via an oxygen atom (O) to a phosphorus atom (P) of at least one group (X) selected from a phosphonic acid group, a phosphoric acid group, and a phosphinic acid group (M-O—P bond), and the group X is bonded to a group R, where R is a hydrocarbon group or a group having an atom other than carbon at one or two positions in the hydrocarbon group, and
a phosphorus atom concentration on a surface of the sanitary equipment part, which is calculated from a peak area of a P2p spectrum measured according to Condition 1 by X-ray photoelectron spectroscopy (XPS), is 1.0 at % or more and 10 at % or less, and
a carbon atom concentration on the surface of the sanitary equipment part, which is calculated based on a peak area of a C1s spectrum measured according to Condition 1 by X-ray photoelectron spectroscopy (XPS), is 35 at % or more;
(Condition 1)
X-ray condition: monochromatic AlKα ray (output 25 W)
Photoelectron take-off angle: 45°
Analysis area: 100 μmφ
Scanning range: 15.5 to 1100 eV.
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