BLACK-PLATED RESIN COMPONENT

To provide a black-plated resin component comprising a black chromium-plated layer composed of not yellowish trivalent chromium.SOLUTION: The black-plated resin component includes a resin base material, a base plated layer formed on the resin base material and a black chromium-plated layer which is formed on the base plated layer, is composed of trivalent chromium and has a film thickness of 0.15 μm or more. In the black-plated resin component, the chromium in the black chromium-plated layer is present in a state of metallic chromium, chromium oxide and chromium hydroxide, and in a surface region from the surface of the black chromium plated layer to at least a depth of 23 nm, a composition ratio of the metallic chromium, the chromium oxide and the chromium hydroxide satisfies inequalities: b+c>4a and c>0.8b (provided that a>0, b>0 and c>0), where a denotes the metallic chromium, b denotes the chromium oxide and c denotes the chromium hydroxide, and b* in L*a*b* color system of the black chromium plated layer measured from the surface region side is 3.0 or less.SELECTED DRAWING: Figure 2 【課題】黄味がかりのない３価クロムよりなる黒色クロムめっき層を備えた黒色めっき樹脂部品を提供する。【解決手段】樹脂基材と、樹脂基材上に形成された下地めっき層と、下地めっき層上に形成された３価クロムよりなる膜厚０．１５μｍ以上の黒色クロムめっき層とを含む黒色めっき樹脂部品において、黒色クロムめっき層中のクロムは金属クロムと酸化クロムと水酸化クロムの状態で存在し、黒色クロムめっき層の表面から深さが少なくとも２３ｎｍまでの表面領域では、金属クロムと酸化クロムと水酸化クロムの組成比が、金属クロムをa、酸化クロムをｂ、水酸化クロムをｃとしたとき（但し、ａ＞０、ｂ＞０，ｃ＞０）、ｂ＋ｃ＞４ａ、且つ、ｃ＞０．８ｂの関係にあり、表面領域側から測定した黒色クロムめっき層のＬ＊ａ＊ｂ＊表色系におけるｂ＊が３．０以下である。【選択図】図２