JP2016008346A - 耐候性鋼材の緻密さび早期形成方法とその方法で製造された耐候性鋼材。 - Google Patents
耐候性鋼材の緻密さび早期形成方法とその方法で製造された耐候性鋼材。 Download PDFInfo
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- JP2016008346A JP2016008346A JP2014131377A JP2014131377A JP2016008346A JP 2016008346 A JP2016008346 A JP 2016008346A JP 2014131377 A JP2014131377 A JP 2014131377A JP 2014131377 A JP2014131377 A JP 2014131377A JP 2016008346 A JP2016008346 A JP 2016008346A
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 239000000463 material Substances 0.000 title claims abstract description 61
- 229910000870 Weathering steel Inorganic materials 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 37
- 230000015572 biosynthetic process Effects 0.000 title claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 76
- 239000010959 steel Substances 0.000 claims abstract description 76
- 229920005989 resin Polymers 0.000 claims abstract description 56
- 239000011347 resin Substances 0.000 claims abstract description 56
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 37
- 229910006540 α-FeOOH Inorganic materials 0.000 claims abstract description 27
- 229910052742 iron Inorganic materials 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 description 15
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 238000011282 treatment Methods 0.000 description 9
- 239000007864 aqueous solution Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- 238000012360 testing method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 6
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 229910006299 γ-FeOOH Inorganic materials 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 239000000654 additive Substances 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- 241000189524 Baccharis halimifolia Species 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- -1 chromium (III) ions Chemical class 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000007602 hot air drying Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 235000014413 iron hydroxide Nutrition 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 229910003153 β-FeOOH Inorganic materials 0.000 description 1
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- Chemical Treatment Of Metals (AREA)
Abstract
【解決手段】 鋼材表面にα−FeOOHまたは非晶質さびを主成分とする鉄さびを含有する樹脂層が形成された耐候性鋼材の表面を濡れ状態にして1時間以上保持し、その後乾燥状態にして1時間以上保持する乾湿繰り返しの操作を1日に1サイクル以上行うことを特徴とする耐候性鋼材の緻密さび早期形成方法。
【選択図】なし
Description
緻密さび早期形成方法における温度条件は5℃〜40℃の所謂一般的な常温環境で行う事が好ましい。5℃以下では、低温のためさび形成速度が遅くなり、40℃を超える環境は、一般に得難く、独立にチャンバーや室などで昇温させる必要があるので、大型鋼構造物の場合には温度維持が困難であり、また経済的な点からも困難を伴うからである。ただし、前述の問題を解決できるならば80℃程度までは、温度を上げる事は問題がない。
水膜のpHが4以下では、鋼の腐食速度が急激に上昇するとともに、OHイオンの供給が少なくなるので、さび層の形成が阻害される。一方、pH8以上では、さび層の形成速度が小さくなる。よって水膜のpHは4〜8の範囲とするのがよい。通常の水道水、河川水、地下水などは本範囲にあり、これらの水を水膜塗布のための水として使用する事ができる。
Claims (5)
- 鋼材表面にα−FeOOHまたは非晶質さびを主成分とする鉄さびを含有する樹脂層が形成された耐候性鋼材の表面を濡れ状態にして1時間以上保持し、その後乾燥状態にして1時間以上保持する乾湿繰り返しの操作を1日に1サイクル以上行うことを特徴とする耐候性鋼材の緻密さび早期形成方法。
- 前記濡れ状態は、耐候性鋼材を相対湿度95%以上の環境に保持して得るか、または耐候性鋼材の表面に水を塗布して水膜を形成させて得ることを特徴とする請求項1記載の耐候性鋼材の緻密さび早期形成方法。
- 前記乾燥状態は、耐候性鋼材を相対湿度60%以下の環境に保持して得るか、または耐候性鋼材の表面に形成した水膜を除去して得ることを特徴とする請求項1記載の耐候性鋼材の緻密さび早期形成方法。
- 前記水膜のpHが4〜8である事を特徴とする請求項2または3に記載の耐候性鋼材の緻密さび早期形成方法。
- 鋼材表面にα−FeOOHまたは非晶質さびを主成分とする鉄さびを含有する樹脂層が形成された耐候性鋼材において、鋼材と樹脂層との界面にα−FeOOHまたは非晶質さびを主成分とする緻密さびが形成していることを特徴とする請求項1乃至4の何れかに記載の方法で製造された耐候性鋼材。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113969399A (zh) * | 2020-07-23 | 2022-01-25 | 中国科学院金属研究所 | 一种耐候钢锈层稳定化处理溶液及处理方法 |
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JPH05247663A (ja) * | 1992-03-06 | 1993-09-24 | Sumitomo Metal Ind Ltd | 錆安定化処理鋼材および錆安定化処理方法 |
JPH06322549A (ja) * | 1993-05-12 | 1994-11-22 | Sumitomo Metal Ind Ltd | 耐候性に優れる表面処理鋼材 |
JPH11256307A (ja) * | 1998-01-08 | 1999-09-21 | Kawasaki Steel Corp | 耐候性鋼材およびその製造方法 |
JP2000273652A (ja) * | 1999-03-23 | 2000-10-03 | Kawasaki Steel Corp | 耐候性鋼材の製造方法 |
US6342554B1 (en) * | 1997-01-27 | 2002-01-29 | Sumitomo Metal Industries, Ltd. | Surface treatment agent for steel material |
JP2002030453A (ja) * | 2000-07-11 | 2002-01-31 | Kawasaki Steel Corp | 耐候性および外観均一性に優れる表面処理鋼材 |
JP2003277943A (ja) * | 2002-03-20 | 2003-10-02 | Jfe Steel Kk | 耐候性および外観均一性に優れる表面処理鋼材 |
JP2004332098A (ja) * | 2003-04-18 | 2004-11-25 | Nippon Steel Corp | 耐候性に優れた鋼材 |
JP2012117145A (ja) * | 2010-11-10 | 2012-06-21 | Nippon Sharyo Seizo Kaisha Ltd | 耐候性鋼材に早期に錆層を形成する方法 |
JP2013166993A (ja) * | 2012-02-15 | 2013-08-29 | Nippon Steel & Sumitomo Metal Corp | 耐食性に優れた表面処理鋼材およびその製造方法 |
JP2013166991A (ja) * | 2012-02-15 | 2013-08-29 | Nippon Steel & Sumitomo Metal Corp | 耐食性に優れた表面処理鋼材 |
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- 2014-06-26 JP JP2014131377A patent/JP6112074B2/ja active Active
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH05247663A (ja) * | 1992-03-06 | 1993-09-24 | Sumitomo Metal Ind Ltd | 錆安定化処理鋼材および錆安定化処理方法 |
JPH06322549A (ja) * | 1993-05-12 | 1994-11-22 | Sumitomo Metal Ind Ltd | 耐候性に優れる表面処理鋼材 |
US6342554B1 (en) * | 1997-01-27 | 2002-01-29 | Sumitomo Metal Industries, Ltd. | Surface treatment agent for steel material |
JPH11256307A (ja) * | 1998-01-08 | 1999-09-21 | Kawasaki Steel Corp | 耐候性鋼材およびその製造方法 |
JP2000273652A (ja) * | 1999-03-23 | 2000-10-03 | Kawasaki Steel Corp | 耐候性鋼材の製造方法 |
JP2002030453A (ja) * | 2000-07-11 | 2002-01-31 | Kawasaki Steel Corp | 耐候性および外観均一性に優れる表面処理鋼材 |
JP2003277943A (ja) * | 2002-03-20 | 2003-10-02 | Jfe Steel Kk | 耐候性および外観均一性に優れる表面処理鋼材 |
JP2004332098A (ja) * | 2003-04-18 | 2004-11-25 | Nippon Steel Corp | 耐候性に優れた鋼材 |
JP2012117145A (ja) * | 2010-11-10 | 2012-06-21 | Nippon Sharyo Seizo Kaisha Ltd | 耐候性鋼材に早期に錆層を形成する方法 |
JP2013166993A (ja) * | 2012-02-15 | 2013-08-29 | Nippon Steel & Sumitomo Metal Corp | 耐食性に優れた表面処理鋼材およびその製造方法 |
JP2013166991A (ja) * | 2012-02-15 | 2013-08-29 | Nippon Steel & Sumitomo Metal Corp | 耐食性に優れた表面処理鋼材 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113969399A (zh) * | 2020-07-23 | 2022-01-25 | 中国科学院金属研究所 | 一种耐候钢锈层稳定化处理溶液及处理方法 |
CN113969399B (zh) * | 2020-07-23 | 2022-10-11 | 中国科学院金属研究所 | 一种耐候钢锈层稳定化处理溶液及处理方法 |
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