Assuming salts are not reused they negate rainbow tables but you can still crack the passwords it just takes much longer as you have to crack each one individually [1]. This can be done faster by renting hashcat farms or spending a lot of money on hashcat rigs yourself. Not all hashes may be salted correctly. [2]

[1] - https://stackoverflow.com/questions/6776050/how-long-to-brut...

[2] - https://hashcat.net/forum/thread-4429.html