Hard Anodize Temperature: Important Crack Risk at Heat

Summary for hard anodize temperature Discussion

hard anodize temperature is the focus of this brief exchange about how Type III hard anodize on aluminum behaves from 120 to 500 F. Bill Milla asked for articles or studies on the effect of temperature on hardness. The only answer in the excerpt comes from Garner, North Carolina, who cites Sheasby and Pinner: fine cracks may be observed at 80-100 C, and the cracking is attributed to the anodic film’s low coefficient of expansion, about 0.2 times that of the metal. The reply does not provide hardness data across the full temperature range, but it does point to thermal cracking as a concern at elevated temperatures. No conflicting views appear in the excerpt, and no specific study results are quoted beyond the reference to Sheasby and Pinner.