SPRAY COATING MATERIAL

PROBLEM TO BE SOLVED: To suppress ignitability of a spray coating material used for thermit thermal spray and dust emission, and improve adhesive property.SOLUTION: The spray coating material is configured so that oxygen or gas including oxygen is sprayed to a formation surface, as carrier gas, and the gas is melted and adhered to the formation surface by combustion heating of metal Si powders. A content of the metal Si powders in whole spray coating material is 10 mass% or more and 25 mass% or less, median size of the metal Si powders is equal to or less than 15 μm, and a content of the metal Si powders having 2 μm or less of grain size in whole metal Si powders is equal to or less than 8 mass%. 【課題】テルミット溶射に使用する溶射材の発火性及び発塵性を抑え、かつ、接着性を向上させること。【解決手段】酸素又は酸素を含有するガスを搬送ガスとして被施工面に吹付け、金属Ｓｉ粉の燃焼発熱で被施工面に溶融付着させる溶射材において、溶射材全体中の金属Ｓｉ粉の含有量を１０質量％以上２５質量％以下、前記金属Ｓｉ粉のメジアン径を１５μｍ以下、前記金属Ｓｉ粉全体中の粒度２μｍ以下の金属Ｓｉ粉の含有量を８質量％以下とした。【選択図】図１