JP7281467B2 - 表面処理された鋼板 - Google Patents
表面処理された鋼板 Download PDFInfo
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Description
以下、本発明による実施例及び本発明によらない比較例を通じて本発明をより詳細に説明するが、本発明の範囲は下記に提示された実施例により制限されるものではない。
「ニッケルめっき層が形成された鋼板」
鋼板表面へのニッケル層の形成は、ニッケル濃度30g/Lのめっき溶液を55℃で電流7.7kAを印加し、電気めっき方式でめっきした。
コロイダルシリカLudox HSA(固形分30%、粒子サイズ12nm、W.R.Grace & Co.-Conn.)にテトラエトキシシランと、溶剤としてエタノール及び酸度調節剤である酢酸をそれぞれ添加した後、温度が約50℃を超えないように冷却させながら約5時間攪拌した。
1.硫酸耐食性
上記表面処理鋼板を70℃に保持される硫酸50vol%水溶液に6時間浸漬させた後、腐食特性を観察した。その評価基準は次の通りである。
○:15mg/cm2/hr未満
△:15以上65mg/cm2/hr未満
×:65mg/cm2/hr以上
上記表面処理鋼板を60℃に保持される硫酸16.9vol%及び塩酸0.35vol%混合水溶液に6時間浸漬させた後、硫酸-塩酸の複合腐食条件における腐食特性を観察した。その評価基準は次の通りである。
○:3mg/cm2/hr未満
△:3以上6mg/cm2/hr未満
×:6mg/cm2/hr以上
上記表面処理鋼板を70℃に保持される硫酸50vol%水溶液に96時間浸漬して腐食を進行させた後、縦横8ポイントずつ計64ポイントの厚さを測定し、最も薄い厚さを観察した。その評価基準は次の通りである。
○:0.10mm以上
△:0.05mm以上0.10mm未満
×:0.05mm未満
上記表面処理鋼板を150cm×75cm(横×縦)のサイズに裁断して試片を製造し、上記試片の表面をクロスカットガイド(cross cut guide)を用いて横及び縦にそれぞれ100個のマスを形成するように1mm間隔で線を引き、上記100個のマスが形成された部分をエリクソン(erichsen)試験機を用いて6mmの高さに押し上げ、押し上げた部位に剥離テープ(NB-1、Ichiban社(製))を付着した後、剥がしながらエリクソン部分が剥離されるか否かを観察した。その評価基準は次の通りである。
○:表面剥離がない場合
△:表面剥離が100個のうち1個~3個である場合
×:表面剥離が100個のうち3個を超えた場合
上記表面処理鋼板を直径38mmサイズの鋼板に製造した後、エリクソンCuppingテスター機を用いて7mmの高さに加工した後、70℃に保持される硫酸50vol%水溶液に6時間浸漬させた後、試片の腐食減量を観察した。その評価基準は次の通りである。
○:15mg/cm2/hr未満
△:15以上65mg/cm2/hr未満
×:65mg/cm2/hr以上
Claims (9)
- 鋼板と、
前記鋼板の少なくとも一表面上に形成されたニッケルめっき層と、
前記ニッケルめっき層上に形成された耐食性被膜層と、を含み、
前記耐食性被膜層は、シリカとアルコキシシランの加水分解反応により形成された生成物及びアクリレート系高分子を含み、
炭素(C)25~65重量%、シリコン(Si)20~70重量%、酸素(O)1~40重量%を含み、
前記ニッケルめっき層は5~10,000mg/m2の付着量を有する、表面処理された鋼板。 - 前記耐食性被膜層は0.1~50μmの厚さを有する、請求項1に記載の表面処理された鋼板。
- 前記ニッケルめっき層は0.0005~1.12μmの厚さを有する、請求項1に記載の表面処理された鋼板。
- 前記鋼板は耐硫酸鋼である、請求項1に記載の表面処理された鋼板。
- 前記耐硫酸鋼は、重量%で、C:0.2%以下(0は除く)、Si:0.5%以下(0は除く)、Mn:1.5%以下(0は除く)、S:0.02%以下、P:0.02%以下、Al:0.1%以下、N:0.008%以下、及びCu:0.1~0.5%であり、残部Fe及びその他の不可避な不純物を含む、請求項4に記載の表面処理された鋼板。
- 前記耐硫酸鋼は、重量%で、Co:0.03~0.1%、Ni:0.3%以下(0は除く)、及びSb:0.3%以下(0は除く)のうち少なくとも一つをさらに含む、請求項5に記載の表面処理された鋼板。
- 前記耐硫酸鋼は、重量%で、C:0.03~0.1%、Si:0.15~0.35%、Mn:0.5~1.2、S:0.01%以下、P:0.015%以下、Al:0.02~0.06、N:0.004%以下、及びCu:0.2~0.4%であり、残部Fe及びその他の不可避な不純物を含む、請求項4に記載の表面処理された鋼板。
- 前記耐硫酸鋼は、重量%で、Co:0.03~0.1%、Ni:0.1~0.25%、及びSb:0.05~0.2%のうち少なくとも一つをさらに含む、請求項7に記載の表面処理された鋼板。
- 前記耐硫酸鋼は、表面直下に厚さ100~300nmのCu、Co、Ni及びSbからなる群から選択された少なくとも1種の濃化層が形成された、請求項6又は8に記載の表面処理された鋼板。
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KR1020170178617A KR102065224B1 (ko) | 2017-12-22 | 2017-12-22 | 강판 표면처리용 용액 조성물 및 이를 이용하여 표면처리된 강판 |
KR10-2017-0178617 | 2017-12-22 | ||
PCT/KR2018/015756 WO2019124865A1 (ko) | 2017-12-22 | 2018-12-12 | 강판 표면처리용 용액 조성물 및 이를 이용하여 표면처리된 강판 |
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KR102045881B1 (ko) * | 2016-09-28 | 2019-11-19 | 주식회사 포스코 | 강판 표면처리용 용액 조성물 및 이를 이용하여 표면처리된 강판 |
CN110512246B (zh) * | 2019-09-29 | 2020-11-03 | 太仓陶氏电气有限公司 | 一种用于电子元器件散热系统的泡沫金属的制备工艺 |
KR102455558B1 (ko) * | 2021-06-01 | 2022-10-21 | 연규승 | 열대차 열풍을 이용한 강제 경화형 친환경 나노 무기세라믹 도료 및 그 도장 방법 |
CN114231987B (zh) * | 2021-11-17 | 2023-09-15 | 首钢智新迁安电磁材料有限公司 | 一种去除耐热刻痕取向硅钢中熔覆物的化学试剂及其方法 |
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JP2021507991A (ja) | 2021-02-25 |
CN111492097A (zh) | 2020-08-04 |
KR102065224B1 (ko) | 2020-01-10 |
EP3730675B1 (en) | 2022-08-24 |
WO2019124865A1 (ko) | 2019-06-27 |
CN111492097B (zh) | 2023-10-24 |
KR20190076647A (ko) | 2019-07-02 |
EP3730675A4 (en) | 2021-03-31 |
EP3730675A1 (en) | 2020-10-28 |
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