報告書番号

182031

タイトル（和文）

耐候性鋼材曝露試験報告書（第１報）－試験方法，初期データと曝露１年後の試験結果－

タイトル（英文）

EXPOSURE TEST OF WEATHER RESISTANT STEEL FORTRANSMISSION TOWERS (1) -TESTING METHODS, INITIAL DATA, TEST RESULTS FOR SAMPLES EXPOSED ONE YEAR

概要 （図表や脚注は「報告書全文」に掲載しております）

耐候性鋼材は建設後のペンキ塗装が不要で，またその安定銹の色調が自然環境に調和することが期待できるとして今後の送電鉄塔への採用が考えられる。そこで赤城試験センターのＵＨＶ実現模試験線１号鉄塔の下部に２つの鋼材を試用した。またこれと共に曝露スタンドを設け２０年間の曝露試験を開始した。試験片は裸材，各種安定化処理を施したものを含み，新日鉄，日本鋼管，住友金属の素材を用いている。サンプリングは曝露１年，３年，５年，１０年，１５年及び２０年に予定している。この報告はその概要，試験方法，初期データ及び１年曝露後の試験結果をまとめたものである。試験には外観観察，色調，さび層の厚さ，浮さび量，膜厚，フェロキシル試験，腐食量，表面粗さ，引張強度，濃縮原素測定を含んでいる。

概要 （英文）

WEATHER RESISTANT IS EXPECTED TO USE FOR TRANSMISSION TOWERS,BECAUSE OF THEIR ADVANTAGES ON MAINTENANCE FREE,THAT IS UNNECESSITY OF PAINTING WORK, AND SUITABILITY OF THE COLOR OF STABILIZED STAIN ON THE JAPANESE LANDSCAPE. THEREFORE SOME MEMBERS OF WEATHER RESISTANT STEEL WERE TRIED TO USE IN THE BOTTOM PART OF NO.1 TOWER IN UHV FULL SCALE TEST LINES BUILT IN THE AKAGI TEST CENTER OF THE INSTITUTE. AT THE SAME TIME,EXPOSURE RACK WAS INSTALLED CLOSE TO TEST LINE AND EXPOSURE OF TEST PIECES WERE BEGUN SINCE BEGINNING OF DECEMBER,1980. EXPOSURE WILL BE CONTINUED TO DECEMBER,2000(TWENTY YEARS) AND SAMPLING WILL BE DONE AFTER 1,3,5,10,15 AND 20 YEARS EXPOSURE.TEST PIECES INCLUDE UNTREATED BARE MATERIALS, AND MATERIALS TREATED WITH VARIOUS STABILIZING PROCOSS. THESE TEST PIECES WERE MANUFACTURED AND OFFERED BY THREE MAJOUR STEEL MANUFACTURERS(SHIN NITTETU CO., NIPPON KOKAN CO.,AND SUMITOMO-KINZOKU CO.,). IN THIS REPORT,TESTING METHODS CONDUCTED FOR TEST PIECES SAMPLED FROM EXPOSURE RACK AFTER EXPOSURE OF ABOVE MENTIONED YEARS,INITIAL DATA OF TEST PIECES,AND TEST RESULTS ON TEST PIECES EXPOSED ONE YEAR ARE DESCRIBED. TESTS FOR TEST PIECES INCLUDE THE APPEARANCE OBSERVATION,MEASUREMENT OF COLOR TONE BY TINTOMETER,MEASUREMENT OF THE THICKNESS OF RUST LAYER,MEASUREMENT OF THE AMOUNT OF LOOSE SCALE,FERROXYL TEST,MEASUREMENT OF CORROSION RATE,MEASUREMENT OF SURFACE ROUGHNESS,TENSILESTRENGTH TESTAND MEASUREMENT OF CONCENTRATED ELEMENTS.

報告者

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