To reveal corrosion behavior of stainless steel delivery pipe used in reclaimed water treatment, this research focused on the morphological, mineralogical and chemical characteristics of stainless steel corrosion scale and corroded passive film. Corrosion scale and coupon samples were taken from a type 304 pipe delivering reclaimed water to a clear well in service for more than 12 years. Stainless steel corrosion scales and four representative pipe coupons were investigated using mineralogy and material science research methods. The results showed corrosion scale was predominantly composed of goethite, lepidocrocite, hematite, magnetite, Three classes of alloys including two ferritic steels (P91 and X20CrMoV11-1), two austenitic stainless steel (SS316 and SS347H), and a Ni-alloy (IN625) were studied as candidate materials for solar salt applications. The compositions of the alloys were obtained using optical emission spectroscopy (OES) and are listed in Table 1. Rectangular coupons were ground to 320 grit SiC abrasive paper, degreased in alcohol and dried in air. The initial dimensions and weight of the coupons were recorded.