US 2021/0172067 A1Published application

Production method for magnesium-containing metal material provided with coating

AssigneeNihon Parkerizing Co., Ltd.

InventorsYukihiro Ueda, Tetsuo Otsuki, Takayuki Yorozu, Ryoko Katsuraya, Naosumi Kamiyama

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Abstract

Provided is a magnesium-containing metal material that includes coatings having excellent corrosion resistance on a surface. Specifically, provided is a magnesium-containing metal material with coating, which is characterized by including: a magnesium hydroxide-containing first coating on a surface of a magnesium-containing metal material composed of magnesium or a magnesium alloy; a hydroxyapatite and/or hydroxyapatite carbonate-containing third coating over the first coating; and a dibasic calcium phosphate-containing second coating between the first coating and the third coating.

Claims5

Dependent claims

A production method for magnesium-containing metal material consisting of a magnesium or a magnesium alloy with coating comprising:

a first step of forming a first coating on the surface of a magnesium-containing metal material to obtain a magnesium-containing metal material with the first coating;
the second step of forming a second coating including a dibasic calcium phosphate over the first coating by contacting chemical conversion agent including the phosphate ion and the calcium ion with the magnesium-containing metal material with the first coating;
and a third step of forming a third coating by contacting an aqueous alkaline solution with the second coating to convert some or all of dibasic calcium phosphate crystals on the surface of the second coating into hydroxyapatite and/or hydroxyapatite carbonate.

Dependencies are inferred from the claim text.

Facts

Application: 17/178,490Filed 18 Feb 2021
Priority: JP 2017-12264322 Jun 2017
Published: 10 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

C23C 22/57
Not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates: treatment…
C22C 23/00
Alloys based on magnesium
C23C 8/10
Only one element being applied: oxidising
C23C 22/22
Orthophosphates: containing alkaline earth metal cations

Family

Application16/623,803Division · filed 18 Dec 2019
Application17/178,490Division
US 2020/0109474 A1Published application
US 2021/0172067 A1This patent

From the US filing history. Foreign family members aren’t listed.

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