This meant no more gummed valves, corroded cylinders or leaking seals. Additionally, older attachments (without substantial corrosion-proofing) may have corroded to a point of weakness. The mechanical shark frequently malfunctioned, due to the hydraulic innards being corroded by salt water. However, the copper bottoms were gradually corroded by exposure to the salt water. The explosion was found to be caused by a failure of corroded pipes. The rest of the wreck was badly corroded. These zinc plates will get corroded first being in the lowest range of anodes. The pyramid is faced with copper, which has corroded to light green. The chemical also corroded the trains, and contaminated the city's water supply, through unsafe dumping. The rigid suspension threw tracks and roller bearings corroded in salt water. The FEAF F-82s, however, arrived in a badly corroded condition. Further oxidation corroded the bronze over the decades and ate holes into the sculptures. They left behind an acid burn stain on a table and corroded plumbing. Using the wrong fluid can cause seals to swell or become corroded. Beryllium cladding can be corroded by some solvents used for cleaning of the pits.