Table 2 The results of the weight loss method of Q235 at different temperatures and different concentrations of G211 inhibitor.

From: Synthesis of Gemini-type imidazoline quaternary ammonium salt using by-product fatty acid as corrosion inhibitor for Q235 steel

G211 Com

(ppm)

Weight loss(mg)

IE(%)

25 ℃

35 ℃

45 ℃

55 ℃

65 ℃

25 ℃

35 ℃

45 ℃

55 ℃

65 ℃

Blank

6.3

13.7

24.5

40.2

80.8

–

–

–

–

–

100

0.9

1.0

1.0

1.6

2.4

85.71

92.70

95.92

96.02

97.03

200

0.7

0.9

0.9

1.4

2.2

88.89

93.43

96.33

96.52

97.28

300

0.6

0.5

0.8

0.9

1.7

90.48

96.35

96.73

97.76

97.90

400

0.5

0.4

0.8

0.9

1.3

92.06

97.08

96.73

97.76

98.39

500

0.4

0.4

0.7

0.8

0.7

93.65

97.08

97.14

98.01

99.13

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