In this paper, a novel aluminizing pretreatment method was developed to enable a strong adhesion of Al2O3 layers on the aluminum-free stainless steel substrate for the application of Fischer-Tropsch microreactor. The Co/Re/W/Al2O3 catalyst coated on a microreactor fabricated with 316 L stainless steel was tested for Fischer-Tropsch synthesis and showed a good activity. Ultrasonic vibration test results showed that the average weight loss of the coating on the aluminized substrate was only one-eighth of that on the untreated plate. A high C5+ productivity of 759.2 mg C5+/g(cat) h was achieved at 220 degrees C and 20 atm under a gas hourly space velocity (GHSV) of 21,000 h(-1), and C5+ selectivity increased with decreasing CO conversion rate. Product distribution shifted toward short-chain hydrocarbons and hydrogenated products at high operation temperatures. Catalyst coating thickness was also optimized to inhibit CH4 production and adjust the olefin/paraffin ratio. (C) 2015 Elsevier B.V. All rights reserved.