A portable passive anti-corrosion vehicle enclosure comprising a support frame system and a flexible enclosure. The support frame system is disposed within the flexible enclosure. The flexible enclosure comprises a floor sheet, a side sheet and a ceiling sheet, where the side and ceiling sheets are supported by the support frame system. The flexible enclosure further comprises a closure means configured for enabling entry and exit of a vehicle and/or a driver. When the vehicle enclosure is erected and sealed, the volume defined by the support frame system is substantially isolated from its surrounding environment. A non-powered passive corrosion protection means is provided within the volume to eliminate or reduce corrosion of exposed vehicle metal components within the volume.